Comparing and Scaling Rates: Investigation 2.3 Homework 1. Keeley buys songs from a music website. She buys 35 songs for $26.25. What is the price per song? a. Complete the table. b. Lucius and Javier discuss how to write an equation relating price and number of songs. Lucius writes the equation n = 0.75C. Javier writes the equation C = 0.75n. Do you agree with Lucius or with Javier? Use the information from parts (a) to explain. 2. For each situation, find a unit rate and write an equation relating the two quantities. a. 3 dozen apples for $4.50 b. 30 bottles of water for $4.80 c. 24 ounces of mozzarella cheese for $2.88 Number of Songs, n 35 50 1 70 Cost, C $26.25 $3 $15
0.75

37.50

cost

dozen

= 4.50/3 = $1.50 / dozen

cost/bottles

2 3. Which of these items is the better buy? a. an 8-pack of glue sticks for $3.99 or 1 glue stick for $.54 b. a 12-pack of tape for $2.50 or 1 roll of tape for $.19 c. a 100-pack of pencils for $4.88 or 1 pencil for $.05 d. a 50-pack of paper clips for $.89 or a 25-pack of paper clips for $.45.

Answers

Answer 1

Answer:

Use the information from parts a

Step-by-step explanation:


Related Questions

Jill earns $264.50 a week. She is married and claims 3 allowances. What amount is withheld weekly for federal income tax?

Answers

As Jill claims 3 allowances then the amount which is withheld weekly for federal income tax is $11.

Given, Jill earns $264.50 a week.

She is married and claims 3 allowances.

From the table if the wage of a married person is at least $260 but less than $270 and has 3 allowances then weekly income tax is $11.

Individual federal income tax rates in the US are progressive, which means that they rise in proportion to taxable income. Federal income tax rates range from 10% to 37%, and they become effective at a certain level of income. Tax brackets are the ranges of income that the rates apply to. Each tax bracket has a different rate of taxation that applies to certain types of income.

Hence the amount is $11 for federal tax.

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Olivia purchased two blouses for $12.50 each and a shirt for $11.25.The sales tax rate is *8.5 %. How much will Olivia pay including tax?

Answers

Answer:

$39.33

Step-by-step explanation:

11.25 + 12.50 +12.50 = 36.25

36.25 + 8.5% = 39.33

A shipping box has a volume of 1,000 cubic inches. What is the length of one side of the box?

Answers

The length of one side of the box is 10 inches.

How to find the volume of a cube?

Suppose that: The side length of the considered cube is L units.

Then, we get the Volume of that cube = L³ cubic units.

The volume of a cube is of the form V =  L³, where L is the side length.

Given that the shipping box has a volume of 1,000 cubic inches.

Here, we know the volume V, but not the measure of length. So, we can plug in the value 1000 for V and solve for L:

1000 =  L³

Cube root both sides:

L = [tex]\sqrt[3]{1000}[/tex]

Therefore, each side is 10 inches.

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math pease help me i need it now asap

Answers

1. The mathematical expression for the length is C. 2x + 5.

2. The quadratic equation is A. 2x² + 5x - 18 = 0.

3. The width of the tarpaulin is A. 2 ft.

4. The length of the tarpaulin is D. 9 ft.

5. The perimeter of the tarpaulin is C. 22 feet.

How to calculate the value?

From the information, the following can be deduced:

Width = x

Length = (2 × x) + 5 = 2x + 5

Area = 18 ft²

The equation will be:

Length × Width =Area

(2x + 5)x = 18

2x² + 5x = 18

2x² + 5x - 18 = 0

2x² - 4x + 9x - 18 = 0

2x(x - 2) + 9(x - 2)

Therefore, x - 2 = 0

x = 0 + 2 = 2

Width = 2

Length = 2x + 5 = 2(2) + 5 = 9ft

Perimeter = 2( Length + Width)

= 2(2 + 9)

= 22 feet.

This illustrates the concept of addition to calculate the perimeter.

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Please find the coordinates and also reflect the points on the axis’s, and please demonstrate and plot the points on the graph too reflect it.

Answers

A' = (1, 3)

B' = (0, 6)

C' = (-3, 5)

D' = (-2, 2)

How far does a rider travel in one complete rotation around the Ferris wheel?

Use 3.14 as an approximation for Pi and round the second answer below to the nearest whole number.

Answers

If the diameter of the Ferris wheel is 80 meters, then a rider will travel  251.2 meters in one complete rotation around the Ferris wheel.

The diameter of the Ferris wheel = 80 meters

The radius of the Ferris wheel = Diameter / 2

= 80/2

= 40 meters

The Total distance travelled by the rider in one revolution = The circumference of the wheel

The circumference of the wheel = 2πr

Where r is the radius of the wheel

Substitute the values in the equation

The circumference of the wheel = 2×3.14×40

= 251.2 meters

Hence, if the diameter of the Ferris wheel is 80 meters, then a rider will travel  251.2 meters in one complete rotation around the Ferris wheel

The complete question is :

If the diameter of the Ferris wheel is 80 meters, how far does a rider travel in one complete rotation around the Ferris wheel?

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Jorge has 173 fish for his dog sled team that he wants to divide into smaller pieces. how many pieces of fish would there be if jorge divided each fish into tenths.

Answers

The number of pieces of fish that would be there if Jorge divided each fish into tenths is 1730.

It is given that Jorge has 173 fish for his dog sled team that he wants to divide into smaller pieces.

We need to calculate the number of pieces of fish that would be there if Jorge divided each fish into tenths.

We know that each of the fish is divided into 10 parts.

The total number of fish available for the dog is 173.

The total number of pieces of fish is equal to the product of the number of available fish and the number of parts each fish is divided into.

The total number of pieces of fish is equal to 173*10.

The total number of pieces of fish is equal to 1730.

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I’m not english person. I cannot understand those. Can someone explain some of them please? I’m trying to pass an english math exam..

Answers

Step-by-step explanation:

lo siento, no tengo idea de cómo explicarte esto. Ummm, hay una aplicación que puedes descargar en tu teléfono para tomar una foto de la hoja de trabajo o el papel y luego la traducirá para ti. Se llama buena traducción o algo en. buena suer

Last night, Luis read 75% more pages than Dayja, and Dayja read 75% more pages than Michael. If Dayja read 84 pages, how many pages did Luis, Dayja, and Michael read all together?

Answers

Answer:

Total pages read = 279 pages

Step-by-step explanation:

Let L, D, and M stand for the pages read by Luis, Dayja, and Michael, respectively.

We learn that:

L = 1.75D,            [Luis read 75% more pages than Dayja]

D = 1.75M, and    [Dayja read 75% more pages than Michael]

D = 84                  [Dayja read 84 pages]

We want the sum of L, D, and M

Total pages = L + D + M

We have three equations and 3 unknowns.  We should be able to find a solution by rearranging and substituting.

Total pages = L + D + M

We can substitute L=1.7D and rearrange D = 1.75 M to M = D/1.75

Total pages = L + D + M

Total pages = 1.7D + D + D/1.75

Total pages = D(1.7 + 1 + 1/1.75)  [Isolate the D, for optional simplification]

Total pages = D(3.271)

We know D = 84, so:

Total pages = 84(3.271)

Total pages = 274.8

We'll round that to 275 pages.

Check:

L = 1.75D:  L read 1.75*275 or 147 pages

D read 84 pages

D = 1.75M, or M = D/1.75;  M read 84/1.75) or 48 pages

Total pages read = 147 + 84 + 48

Total pages read = 279 pages

A one way train ticket in the city cost 1.85 a monthly pass cost 65$. For what number of rides should you buy the monthly pass?

Answers

Answer: 36 rides

Step-by-step explanation: Because is you divide 65 by 1.85 you get 35.13513513513514 so just round it to the next integer of 36.

f (x)=(x-3)^2 + 4 when is f increasing

Answers

Answer:

(3,∞)

Explanation:

Given the function:

[tex]f(x)=\mleft(x-3\mright)^2+4[/tex]

The graph of f(x) is attached below:

The interval when f(x) is increasing is therefore: (3,∞)

The foot of a ladder is 1.5 m from a vertical wall. The ladder makes an angle of 68° with the horizontal. How far up the wall does the ladder reach? Draw a picture and show work!

Answers

The length of the wall for the ladder reach will be 3.4 meter.

What is mean by Multiplication?

To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.

Given that;

The foot of a ladder is 1.5 m from a vertical wall.

And, The ladder makes an angle of 68° with the horizontal.

Now,

By the figure,

The length of BC = 1.5 m

The measure of ∠ACB = 68°

So, Find the length of AC as;

cos 68° = 1.5 / AC

AC = 1.5 / 0.44

AC = 3.4 m

Therefore,

The length of the wall for the ladder reach will be 3.4 meter.

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a force of 4 pounds is required to hold a spring stretched 0.2 feet beyond its natural length. how much work (in foot-pounds) is done in stretching the spring from its natural length to 1.1 feet beyond its natural length?

Answers

Using the spring's force we know that 48.4 lb-ft work is done in stretching the spring from its natural length to 1.1 feet beyond its natural length.

What does a spring's force mean?When a spring is in its equilibrium position, it applies a force F = -kx in that direction. A spring's force works as a restoring force, bringing the spring back to its equilibrium length.

So, F is the 4 lb force required to maintain the spring's stretched position.

The spring has a 0.2-foot stretch, and its spring constant is k.Applying the equation F = k x 4 = k (0.2) k = 80 lb/ft.U is the effort put in to expand the spring, where x' is equal to 1.1 feet.

The labor of extending a spring is denoted by the formula:

U = (0.5) k x'2

So, calculate:

U = (0.5). (80). (1.1)² U = 48.4 lb-ft

Therefore, 48.4 lb-ft work is done in stretching the spring from its natural length to 1.1 feet beyond its natural length.

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HELP PSLSPSLAPSLSPSLSPSLSPSLSPSL

Answers

D) 40

If both lines match…

Every 60 minutes is an hour, so choose the number on the first line that corresponds to 60.

40 miles on the first line is on the same location as 60 on the second line

Answer: D) 40

Step-by-step explanation:

mph (miles per hour)

60 minutes is an hour, so the number of miles above 60 minutes (which is 40) is the answer.

Hope this helps!

Find the first five terms of the sequence defined below, where n represents the position of a term in the sequence. Start with n = 1.an = 4n − 5

Answers

Okay, here we have this:

Considering the provided sequence, we are going to find the requested first five terms of the sequence, so we obtain the following:

So what we will do is replace n from 1 to 5, we have:

n=1:

an=4n-5

a1=4(1)-5

a1=4-5

a1=-1

n=2:

an=4n-5

a2=4(2)-5

a2=8-5

a2=3

n=3:

an=4n-5

a3=4(3)-5

a3=12-5

a3=7

n=4:

an=4n-5

a4=4(4)-5

a4=16-5

a4=11

n=5:

an=4n-5

a5=4(5)-5

a5=20-5

a5=15

Finally we obtain that the first five terms are: -1, 3, 7, 11, 15

Determine the value for x in the equation x over 5 and 7 tenths equals 2 and 3 tenths.

Answers

The solution of x in the mathematical statement is 11.73

How to determine the value of x?

From the question, the mathematical statement is given as

x over 5 and 7 tenths equals 2 and 3 tenths.

When represented as an algebraic equation, we have

x/5.10 = 2.30

To start with, we multiply both sides of the equation by 5.10

This is represented as

5.10 * x/5.10 = 2.30 * 5.10

Evaluate the product on the left-hand side

So, we have

x = 2.30 * 5.10

Evaluate the product on the right-hand side

So, we have

x = 11.73

Hence, the value of x is 11.73

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The required simplified value of the given numeral is given as 13.11.

As given in the question, to determine the value for x in the equation x over 5 and 7 tenths equals 2 and 3 tenths.

What is the equation?

The equation is the relationship between variables and represented as y = ax + b is an example of a polynomial equation.

Here,
The statment given in the word string, first transform the equation in the mathematical inscription,
So,
x / 5.7 = 2.3
Simplifying,
x = 5.7 × 2.3
x = 13.11

Thus, the required simplified value of the given numeral is given as 13.11.

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Learning target: I can calculate the surface area of 4 ( width) cm and 20 (height) cm

Answers

Answer:

20 times 4

Step-by-step explanation:

suricce area

20 times 4
STEP-BY-STEP-EXPLANATION

Please help ASAP! Compare and contrast the formulas for P(A and B) for dependent and independent events. What is the relationship between P(B) and P(B|A) and can one equation be used for both independent and dependent events?

Answers

The equation P(A and B) = P(A) P(B|A) yields the likelihood that A and B will occur.If the events A and B are not mutually exclusive, the probability is: (A or B) = p(A) + p(B) – p(A and B).We cannot use  one equation  for both independent and dependent events.

Dependent events;

The probability of one event DOES effect the probability of a 2nd event.

Independent events;

The probability of one event DOES NOT effect the probability of a 2nd event

Give the equation for calculating the likelihood that events A and B will occur when A and B are dependent events. The equation P(A and B) = P(A) P(B|A) yields the likelihood that A and B will occur.If the events A and B are not mutually exclusive, the probability is: (A or B) = p(A) + p(B) – p(A and B).We cannot use  one equation  for both independent and dependent events.

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Solve for x. Show each step of the solution.

5(2-x)-10=25-2(3x+40)

Answers

5(2-x)-10=25-2(3x+40)

Remove the parentheses

10-5x-10=25-6x-80

Remove the opposites calculate

-5x=-55-6x

Move the variable to the left

-5x+6x=-55

Collect like terms

Solution
X= -55

Answer:

x = -55

Step-by-step explanation:

Given equation,

→ 5(2 - x) - 10 = 25 - 2(3x + 40)

Now the value of x will be,

→ 5(2 - x) - 10 = 25 - 2(3x + 40)

→ 10 - 5x - 10 = 25 - 6x - 80

→ -5x + 6x = 25 - 80

→ [ x = -55 ]

Hence, the value of x is -55.

5(2-x)-10=25-2(3x+40)

Remove the parentheses

10-5x-10=25-6x-80

Remove the opposites calculate

-5x=-55-6x

Move the variable to the left

-5x+6x=-55

Collect like terms

Solution
X= -55

Answer:

x = -55

Step-by-step explanation:

Given equation,

→ 5(2 - x) - 10 = 25 - 2(3x + 40)

Now the value of x will be,

→ 5(2 - x) - 10 = 25 - 2(3x + 40)

→ 10 - 5x - 10 = 25 - 6x - 80

→ -5x + 6x = 25 - 80

→ [ x = -55 ]

Hence, the value of x is -55.

A bouncy ball is dropped such that the height of its first bounce is 3.75 feet and each successive bounce is 79% of the previous bounce's height. What would be the height of the 7th bounce of the ball? Round to the nearest tenth (if necessary).

Answers

The ball would bounce to a height of 0.92 feet at the 7th bounce

How to determine the height of the 7th bounce of the ball

The given parameters are

Initial height = 3.75 feet

Rate of bounce = 79%

The height of the ball after n-th bounce is represented as

H(n) = A * rⁿ⁻¹

Where

A = Initial height = 3.75 feetr = Rate of bounce = 79%n = Number of bounce

In this case, we have

n = 7

So, we have

H(7) = 3.75 * (79%)⁷⁻¹

Evaluate the difference

H(7) = 3.75 * (79%)⁶

Evaluate the product

H(7) = 0.92

Hence, the height of the 7th bounce of the ball is 0.92 feet

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solve and show working:- log(x^2 + 7) base 4 = 2​

Answers

The value of x for the given logarithm equation  log(x^2 + 7) base 4 = 2​ is x = ± 3.

What is a logarithm?

The exponent indicates the power to which a base number is raised to produce a given number called a logarithm.

In another word, a logarithm is a different way to denote any number.

It is known that [tex]log_{a}b[/tex] = c can be written as [tex]a^{c}[/tex] = b.

Given that, log(x^2 + 7) base 4 = 2​

Therefore, x² + 7 = 4²

x² + 7 = 16

x² = 16 - 7 = 9

x² = 9

x = ±3

Hence "The value of x for the given logarithm equation  log(x^2 + 7) base 4 = 2​ is x = ± 3".

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Find the two square roots of 1/16

Answers

Answer:

1/4

Step-by-step explanation:

The square root of 1/16 = 1/4

they probably

The two square roots of 1/16 are +1/4 and -1/4

Estimate √172 to the nearest tenth. Locate the irrational number on a number line.​

Answers

The irrational number on a number line is 13.1. All real numbers that are not rational are considered irrational numbers. In other words, it is impossible to describe an irrational number as the ratio of two integers.

What is  irrational number ?

All real numbers that are not rational numbers are referred to be irrational numbers in mathematics. In other words, it is impossible to describe an irrational number as the ratio of two integers.There is no length, no matter how short, that could be used to express the lengths of both of the two supplied segments as integer multiples of itself.

Square Root of 172 to the nearest tenth, means to calculate the square root of 172 where the answer should only have one number after the decimal point.

Calculate

We calculate the square root of 172 to be:

√172 = 13.11487704860400

Reduce

Reduce the tail of the answer above to two numbers after the decimal point: 13.11

Round

Round 13.11 so you only have one digit after the decimal point to get the answer: 13.1

To check that the answer is correct, use your calculator to confirm that 13.1² is about 172.

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What is the effect on the graph of f (x) = |x| when the function is changed to g(x) =-2|x|

Answers

Here the graph shows reflection across x - axis by 2 units.

f(x) = |x| => g(x) = -2|x|.

Solution:Graph transformation is the process of modifying an existing graph or graphed equation to produce a variation of the following graph.The modification of algebraic equations is a common type of problem in algebra.

Here given the parent function, f(x)=|x|

The translation is , g(x)= -2|x|

Which is an absolute function.

Here the transformation is .

f(x)=|x|  => g(x)= -2|x|

The value of f(x) is reflecting over x- axis and value of y changes by 2 units.

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I need help with this geometry question !! Pls help

Answers

The values of variable x are x₁ = 16, x₂ = - 4.

The measure of angle R is 60°.

The lengths of side RS are RS₁ = 256 and RS₂ = 16.

The lengths of side RT are RT₁ = 256 and RT₂ = 16.

How to find the variables associated to a given triangle

In this problem we need to find the values of four variables related to a triangle, which is seen in the picture, indicating an equilateral triangle. The solution of this question must be done by using definitions and theorems from Euclidean geometry:

Value of variable x

According to Euclidean geometry, the measures of the three sides in an equilateral triangle are the same. Then, the variable x can be found by solving the following equation:

RT = RS

x² = 12 · x + 64

x² - 12 · x - 64 = 0

(x - 16) · (x + 4) = 0

There are two possible solutions:

x₁ = 16, x₂ = - 4

Measure of the angle R

Equilateral triangles have three internal angles of 60°. Therefore, m ∠ R = 60°.

Length of side RS

There are two options:

RS₁ = 16²

RS₁ = 256

RS₂ = (- 4)²

RS₂ = 16

Length of side RT

There are two options:

RT₁ = 12 · 16 + 64

RT₁ = 256

RT₂ = 12 · (- 4) + 64

RT₂ = 16

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There are two bags containing only black and green marbles.

Answers

Answer:

Event 4, Event 1, Event 3, Event 2

Explanations:

Number of black marbles in bag A = 11

Number of green marbles in bag A = 9

Total number of marbles in bag A = 11 + 9 = 20

Number of black marbles in bag B = 8

Number of green marbles in bag B = 2

Total number of marbles in bag B = 8 + 2 = 10

Event 1:

Likelihood of choosing a black marble from bag A = 11/20 = 0.55

Event 2:

Likelihood of choosing a black or green marble from bag A = 11/20 + 9/20

Likelihood of choosing a black or green marble from bag A = 0.55 + 0.45

Likelihood of choosing a black or green marble from bag A = 1

Event 3:

Likelihood of choosing a balck marble from bag B = 8/10 = 0.8

Event 4:

Likelihood of choosing a purple marble from bag B = 0

Since there is no purple marble in bag B

Arrangement of the events from the least likely to the most likely will be:

Event 4, Event 1, Event 3, Event 2

what is the standard form of the equation for part a

Answers

Answer:

yea, correct, perfect yes sir

Jessica wants to make a spinner that has all of the following characteristicsSketch a possible spinner for Jessica. Be sure to label each section of thespinner with a name and with its theoretical probability.• Blue, red, purple, and green are the only colors on the spinner.• It is half as likely to land on blue as to land on red.• It is three times as likely to land on purple as green.• There is a 50% probability of landing on either blue or red and a 50%probability of landing on either purple or green.

Answers

First we have to split the spinner into two equal parts. One half belongs to the blue and red sections, and the other half belongs to the green and purple sections.

Formulating an equation for the first part, we have:

P(b) + P(r) = 0.5 ( P(b): probability of landing on blue section, P (r): probability of landing on red section)

P(r) + 1/2*P(r) = 0.5 ( Since it is half as likely to land on blue as to land on red)

3/2*P(r) = 0.5 (Adding like terms)

P(r)= 0.5 / (3/2) (Dividing on both sides by 3/2)

P(r)= 1/3 (Dividing)

P(b)=1/2*P(r) (Finding the probability of landing on blue section)

P(b)= 1/6

Formulating an equation for the second part, we have:

P(g) + P(p) = 0.5 ( P(g): probability of landing on green section, P (r): probability of landing on purple

section)

P(g) + 3*P(g) = 0.5 ( Since it is three times as likely to land on purple as green)

4*P(g) = 0.5 ( Adding like terms)

P(g) = 0.5/4 (Dividing by 4 on both sides of the equation)

P(g) = 1/8 (Dividing)

P(p) = 3*P(g) (Finding the probability of landing on purple section)

P(p)= 3/8

I will give brainlist ! very fast.. Hello its a math question is the last option the correct answer i am not sure please help

Answers

Hello!

Let's take this step-by-step:

The formula for the Area of the Triangle:

  [tex]Area = \dfrac{1}{2} *\text{Base} *\text{Height}[/tex]

In this case:

Height: x + 3Base: 2x + 4

Let's plug in those value's into the equation:

    [tex]\text{Area}=\dfrac{1}{2} *(2x +4)*(x+3)\\\\\\\text{Let's first multiple '2x + 4' and 'x+3'}\\\text{Area}=\dfrac{1}{2} *(2x^2+6x + 4x + 12)=\dfrac{1}{2} *(2x^2+10x + 12)\\\\\\\\\\\textNow multiple 1/2 in the function in the parentheses}\\\text{Area}=\dfrac{1}{2} *2x^2 + \dfrac{1}{2}*10x +\dfrac{1}{2} *12\\\\\text{Area}=x^2+5x + 6[/tex]

Answer: [tex]x^2 + 5x +6[/tex]

Hope that helps!


What is the smallest and greatest number that rounds to 380 when
rounding to the nearest ten?

Answers

The smallest and greatest number that rounds to 380 when rounding to the nearest ten are 375 and 384 respectively.

What is rounding a number?

Adjusting a number's digits so that it produces an approximation of a result is known as rounding.

The given number is 380.

When rounding a number to the nearest ten, pay attention to the last digit; if it is less than five, round down; if it is five or more, round up.

Therefore, the smallest number that rounds to 380 when rounding to the nearest ten is 375.

Similarly, the greatest number that rounds to 380 when rounding to the nearest ten is 384.

Hence, the smallest and greatest number that rounds to 380 when rounding to the nearest ten are 375 and 384 respectively.

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find the value of the expression 4d c when c=3and d=6 simplify your answer imagine a person suffering from memory loss who could not consciously remember the fact that her new neurologist had pinpricked her hand the last time they met. though her memory for events that took place prior to the amnesia is normal, after the amnesia she has experienced difficulty creating new memories. her memory loss is best considered to be an example of when 1 kg of water and 1 kg of wood absorb the same amount of heat, the change in temperature of water is less than the changes in temperature of the wood. which statement helps to explain this difference? A. The latent heat of fusion of water is less than of wood. B. Intermolecular forces in water are less than those in wood.C. Intermolecular forces in water are greater than those in wood.D. The latent heat of fusion of water is greater than that of wood. What are some responsibilities of a nation expanding their territories? When you are on the 2nd step of factoring this trinomial,you should be listing the factors of? an air-track glider attached to a spring oscillates between the 15.0 cm mark and the 66.0 cm mark on the track. the glider completes 12.0 oscillations in 41.0 s. what is the period of oscillations? What is the index of refraction for a medium where light has a velocity of 2.75 x10 m/s?0.9176.751.090.250 how can you obtain the points for the log below from its inverse? Created by Cortin Lyons riables on Both Sides #3 2.12r 14 = 8x + 16 12x 14 = 6x + 16 as with Distributive Property 50 kg pitcher throws a baseball with a mass of 0.15 kg. If the ball is thrown with a positive velocity of 35 m/s and there is no net force on the system, what is the velocity of the pitcher?0.1 m/s0.2 m/s0.7 m/s1.4 m/s Slope =y-intercept = (0, A 695.7 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 daysthe amount of radioactive substance had decreased to 86.96 ng. How many half-lives of the unknown radioactive substancehave occurred? Given the equation y = x (x - 3)(2x + 7), find the rational roots. Complete theexplanation.The rational roots are x =, and. I found my answers bygraphing the equation, then finding where the equation crossed the (select) 4' 13-17y+16z= 73-11x + 15y + 17z= 61 46x+10y-30z = -18 I need help ASAP, please!!!Kyle performed the following sequence of tests with a solution of Fe2+ ions:(i)To a solution of iron (II) he added a little dil.H2SO4 , then hydrogen peroxide solution very slowly. He retained the mixture.(ii) To the mixture that was retained he added sodium hydroxide.Predict and explain what Kyle would observe in both steps in the above reaction sequence. A company has developed a new deluxe AAA battery that is supposed to last longer than its regular AAA battery. However these new batteries are more expensive to produce. So the company would like to be convinced that they really do last longer. Based on years of experience, the company knows that its regular AAA batteries last lor 45 hours of continuous use. On average. The company selects an SRS Of 50 new batteries and uses them continuously until they are completely drained. The Sample mean lifetime is X =46.9 hours with a Standard deviation of S=4.6 hours A) Check for the conditions for the situation B) Calculate the test statistic for this situation C) What is the P value for this situation? D) What conclusion do you draw with 5% significance level? why? E) What type of error could you possibly make here? I knowing that even the most sophisticated techniques of analysis cannot make up for poor data, the researcher must attempt, however, to choose a survey method that achieves the client's budget restrictions and resources. true false Which is the change in size of a group of organisms of the same species over time?-population growth-death rate-birth rate-immigration and emigration What is the most important reason to raise awareness about cyberbullying? group of answer choices people trust the friends they meet online as much as real-life friends. cyberbullying is part of a global trend toward more online abuse. cyberbullies may not see their online actions as real or dangerous. most platforms have tools that cyberbullies can misuse to find targets. according to the company's records, the conversion cost in beginning work in process inventory was $15,660 at the beginning of september. additional conversion costs of $526,524 were incurred in the department during the month. the cost per equivalent unit for conversion costs for september is closest to: (round off to three decimal places.)