Given:
Initially, the cell phone was 80% charged.
Then started to lose 8% charge for each hour thereafter.
To find:
The equation for B in terms t
3×10^9
---------
3×10^-7
Answer:
1 x 10^16
Step-by-step explanation:
There are 10 books are arranged on a shelf. If 4 books you are choosing are in alphabetical order,how many different groups of books could be chosen? Determine if it is permutation orcombination then solve.A). 24B). 210C). 3,628,800D). 5040
The problem says you have 10 books arranged on a shelf and then you are choosing 4 books in alphabetical order.
Given that you are choosing books with an order (alphabetical) it means the order does matter, then it is a permutation (which is an ordered combination).
In this case, no repetitions are allowed because you can't repeat a book in the selection, they'll be 4 different books from the shelf, the formula you have to use is:
[tex]\frac{n!}{(n-r)!}\begin{cases}n=\text{total number of books} \\ r=\text{ number of books you are choosing}\end{cases}[/tex]Then n=10 and r=4, replace these values:
[tex]\frac{10!}{(10-4)!}=\frac{3628800}{720}=5040[/tex]Then, can be chosen 5040 different groups of books.
The answer is option D.
provide an appropriate response. the owner of a computer repair shop has determined that their daily revenue has mean $7200 and standard deviation $1200. the daily revenue totals for the next 30 days will be monitored. what is the probability that the mean daily revenue for the next 30 days will be less than $7000?
The probability that the mean daily revenue for the next 30 days will be less than $7000 IS 0.7333
Standard deviation of the sample is equal to the population's Standard Deviation divided by the square root of the sample's item count.
Standard Deviation of the sample = [tex]1200/\sqrt{30} = 219.09[/tex]
SD of the sample is equal to the population's Standard Deviation divided by the square root of the sample's item count.
To reach a result of 300, divide 7500 by the mean of 7200. 300 divided by the sample's SD (219.09) yields a result of 1.37. A z-table search for +1.37 returns a result of 0.9147. Accordingly, there is a 0.9147 percent chance that the average daily revenue over the following 30 days will be less than $7500.
To get a result of -200, divide 7000 by the mean of 7200. Divide -200 by the sample's standard deviation (219.09), and you'll get -0.91. search for -0.91 in a z-table receive a score of 0.1814. The likelihood that the mean daily revenue for the following 30 days would be less than $7000 is therefore 0.1814.
Simply subtract the likelihood that the mean daily revenue is less than $7000 (0.1814) from the likelihood that the mean daily revenue is less than $7500 (0.9147) to arrive at the probability that the mean daily revenue for the upcoming 30 days will be between $7000 and $7500. This yields a result of 0.7333.
There is a 73.33% chance that the average daily income over the following 30 days will be less than $7000.
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The right triangle on the right is a scaled copy of the right triangle on the left. Identify the scale factor. Express your answer as a whole number or fraction in simplest form. 5 12 4 5/3
The dimensions of the left triangle are equal to the right triangle's dimensions times 1/3.
Given,
The right triangle on the right is a scaled copy of the right triangle on the left.
The measure of first triangle = 3,4
The measure of second triangle = 2, 3/2
We have to find the scale factor
The figure indicates that the right triangle on the left would be three times larger than the right triangle on the right. In this case, the right triangle's dimension is one third of the left triangle's dimension.
The left one is three times bigger than the right one. In other words, the dimensions of the left triangle are equal to the right triangle's dimensions times 1/3.
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What is the degree of the polynomial above?
(A.) 1
(B.) 2
(C.) 3
(D.) 4
Answer:
The answer is B.
Step-by-step explanation:
I remember this question.
Answer:
c
Step-by-step explanation:
find the ratio of the shaded pattern to the total area of the figure.
We are given a rectangle with the following dimensions;
[tex]\begin{gathered} l=(x+3) \\ w=(x+1) \end{gathered}[/tex]Also, placed inside the large rectangle, is a smaller shaded rectangle which has the dimensions;
[tex]\begin{gathered} l=(x+1) \\ w=x \end{gathered}[/tex]The ratio of both figures can be expressed as follows;
[tex]\text{Ratio}=a\colon b=\frac{a}{b}[/tex]Substituting for the values of both figures, we now have;
[tex]undefined[/tex]What is the average speed of a walker who walks 600hm in 20 seconds
Answer:
30 km/s
Explanation:
Formula for average speed = Total distance/total time
From the question,
Total distance = 600 km, Total time = 20 seconds
∴ Average speed = 600 km/20 seconds
Average speed = 30 km/s
21 A forklift has a maximum carrying capacity of 960 pounds. Each cargo box weighs 60 pounds.
a. Write and solve an inequality that represents the maximum number of cargo boxes the
forklift can carry.
b.
A 120-pound carrying case is used to hold the cargo boxes. What is the maximum number
of cargo boxes the forklift can carry when the carrying case is used? Show that your answer
is correct by showing that one more than your answer would exceed the forklift's capacity
Using the concept of inequality, it can be concluded that;
a) Maximum number of cargo boxes the forklift can carry is 16.
b) Maximum number of cargo boxes the forklift can carry when the carrying case is used is 14.
What is the inequality in mathematics?An inequality in mathematics is a relation that compares two numbers or other mathematical expressions in an unequal way. The most frequent application is to contrast two numbers on the number line based on their sizes.
Let the no. of cargo box be x.
So the equation is 60x≤960
x≤960/60
x≤16
Now the 120 pound additional weight is needed so the equation is:
120 + 60x≤960
60x≤840
x≤14
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Directions: Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.Solve for x.( + 0.5) + 5.24 = = + ( + 2.2)The value of x is
1/5 (x+0.5) +5.24 = 3/2x + 7/10 (x+2.2)
First, apply the distributive property to solve the parentheses
1/5(x)+ 1/5 (0.5) +5.24 = 3/2x + 7/10(x) + 7/10 (2.2)
1/5x +0.1 +5.24 = 3/2x + 7/10 x + 1.54
Combine like terms
1/5x +5.34 = 11/5x +1.54
Move the x terms to the left side of the equation:
1/5x-11/5x = 1.54-5.34
-2x = -3.8
Divide both sides by -2
-2x/-2 = -3.8/-2
x = 1.9
After the expression (x10)^3/5 Is simplified as much as possible, x is raised to what exponent?
The exponent of x in the expression (x¹⁰)³⁺⁵ is 6.
What is an exponent?Exponent rules, commonly referred to as the "laws of exponents" or "properties of exponents," facilitate the task of simplifying exponent-based statements. These rules can help simplify formulas with exponents that are decimals, fractions, irrational numbers, or negative integers.
The mathematical process known as an exponent often indicates the power of a variable.
As of right now, we are aware that under the scenario of
[tex](x^{a})^{b} = x^{ab}[/tex]
Therefore, solve the power by multiplying 10 by 3/5, and we get
10 × (3/5)
=6
Thus, the expression simplified as
(x¹⁰)³⁺⁵ = x⁶
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Which of the following rational functions is graphed below?
Write the expression 16x + 28 as a product using the GCF as one of the factors.
Please help.
Answer:
4(4x + 7)
Step-by-step explanation:
To answer this question you need to understand what GCF is
GCF is Greatest Common Factor
GCF is the highest number that divides exactly into two or more numbers.
The expression is 16x + 28
The highest number that can divide 16 and 28 is 4
Dividing 16x + 28 gives => 16x/4 + 28/4 => 4x + 7
So the factored expression is
4(4x + 7)
Is the function positive or negative over the interval (–8, –6)?
Answer:negative
Step-by-step explanation:
Because it should be on the bottom left corner if you are using a graph it is different in each corners of the graph. There is four sides for the graph.
Sean weighs 10 lb more than twice Brad’s weight. If Brad gains 10 lb, together they will weigh 230 lb. How much does each weight now?
The weight of Brad is 70 lb and the weight of Sean is 150 lb now.
According to the question,
We have the following information:
Sean weighs 10 lb more than twice Brad’s weight. If Brad gains 10 lb, together they will weigh 230 lb.
Now, let's take Brad's weight to be x lb.
So, we have:
Sean's weight = (10+2x) lb
Now, when Brad gains 10 lb, we have the following expression:
(x+10)+(10+2x) = 230
3x+20 = 230
3x = 230-20
3x = 210
x= 210/3
x = 70 lb
Now, Sean's weight = (10+2x) lb
Putting the value of x:
Sean's weight = 10+2*70
Sean's weight = 10+140
Sean's weight = 150 lb
Hence, the weight of Brad is 70 lb and the weight of Sean is 150 lb now.
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What is the quotient in simplest form?
12/7 divided by 3
A. 7/36
B. 4/7
C. 1 3/4
D. 5 1/7
Answer:
Step-by-step explanation:
the answer would be the second option
hassan is cooking some rice.
the recipe says he needs 450 granms of rice for 6 people
how many kilograms of rice would he need for 18 people
Answer:
Round 1350 to decimal form and your answer should be 1.35 kg.
Find the pairs (LOTS OF POINTS!)
1. The pairs for each tent, based on common factors of 40, are given as follows (1, 40), (2, 20), (4, 10), (5, 8), (8, 5), (10, 4), (20, 2), and (40, 1).
2. Matching the number of tents with the number of boys is as follows:
Number of Tents Number of Boys1 40
2 20
3 No match
4 10
5 8
6 No match
7 No match
What are the factors?The factors of a number are the numbers that can divide it exactly or without a remainder.
For instance, the factors of the number, 40, are 1, 2, 4, 5, 8, 10, 20, and 40.
Thus, there are 8 ways that the tents can be arranged to accommodate the campers (boys) based on the factors of 40.
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A rectangular garden has a length of 60 feet (ft), a width of w ft, and a perimeter of 200 ft.
Which of the following equations best models the garden's perimeter?
The width of the rectangular garden is 40feet. The equation that represents the garden's perimeter is 2(60 + w) = 200.
A rectangular garden has a length of 60 feet (ft)
a width of w ft
and a perimeter of 200 ft.
The formula of perimeter of a rectangle is 2(lenght + width)
The equation that represents the garden's perimeter is 2(60 + w) = 200
2(60 + w) = 200
120 + 2w = 200
2w = 200 - 120
2w = 80
w = 40
Therefore, width of the rectangular garden is 40feet. The equation that represents the garden's perimeter is 2(60 + w) = 200
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A tent pole that is 9 feet tall is secured to the ground with a piece of rope that is 15 feet long from the top of the tent pole to the ground. Determine the number of feet from the tent pole to the rope along the ground.
The number of feet from the tent pole to the rope along the ground will be 12 Feet.
Let:
PR be the tent pole 9 Feet tallPQ be the piece of rope 15 Feet longRq be the distance between the tent pole and the rope along the groundRQ = x
According to Pythagoras Theorem:
[tex]Hypotenuse^{2} = Perpendicular^{2} + Base^{2} \\PQ^{2} = PR^{2} + RQ^{2} \\15^{2} = 9^{2} + x^{2} \\225 = 81 + x^{2} \\x^{2} = 225 - 81\\x^{2} = 144\\x = 12[/tex]
Therefore, the number of feet from the tent pole to the rope along the ground will be 12 Feet.
Pythagoras Theorem is widely used to establish the relation between the three sides of a right-angled triangle. The applications of Phythagoras Theorem are the angle of depression, angle of elevation, etc. Even the Eiffel tower is one of its applications.
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if 63 Naira is shared in the ratio 4 ratio 5 what is the larger share
Answer:
35
Step-by-step explanation:
sum the parts of the ratio, 4 + 5 = 9 parts
divide 63 by 9 to find the value of 1 part of the ratio
63 ÷ 9 = 7 , then
4 parts = 4 × 7 = 28
5 parts = 5 × 7 = 35 ← larger share
in linear regression analysis the quantity that gives the amount by which the dependent variable changes for a unit change in the independent variable is called the
It is called the slope of the regression line.
The slope of the regression line including the intercept displays the linear relationship between 2 variables and can also be used in estimating an average change rate.
The slope of a regression line depicts the rate of change in the dependent variable as the independent variable alters because the dependent variable y is dependent on the independent variable x.
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Airfare from Atlanta, GA to Nashville, TN was decreased from $250 to $180. By what percentage did the cost of the airfare change
this is junior high math
Step-by-step explanation:
100% = $250
1% = 100%/100 = 250/100 = $2.50
the price decreased by
250 - 180 = $70
how many % are $70 ?
as many as how many times 1% ($2.50) fits into $70 :
70 / 2.50 = 28%
it changed (decreased) by 28%.
The equation of a line is given below.2x+6y=-18Find the x-intercept and the y-intercept.Then use them to graph the line.X-intercept:0Х5?ca loxy-intercept:0?
Given equation of the line is
[tex]2x+6y=-18[/tex]Dividing both sides of the above equation by -18, we get
[tex]\frac{x}{-9}+\frac{y}{-3}=1[/tex]The line cuts the x axis at (-9,0) and the y axis at (0,-3).
Therefore, the x intercept is -9 and the y intercept is -3.
The graph of the line is shown below.
Write a simplified explession for the perimeter of the triangle.
[tex]p =( 1.5x - 3) + (1.5x - 3) + (0.75x - 1) \\ = 1.5x + 1.5x + 0.75x - 3 - 3 - 1 \\ p= 3.75x - 7[/tex]
ABOVE IS THE SIMPLIFIED PERIMETER OF THE TRIANGLE.
Expand and simplify.2(2x+1)-3(4x-5)is the answer -8x+17?
Hello
To expand this, we will multiply the value outside the bracket with the one inside the bracket.
[tex]\begin{gathered} 2(2x+1)-3(4x-5) \\ 4x+2-12x+15 \\ \text{collect like terms} \\ -8x+17 \end{gathered}[/tex]The answer to this question is -8x +17
value outside the bracket with the one inside the bracket.
cenario 2: the directors of an annual community concert want to learn the musical preferences of the audience. the directors choose 2 and 6 from a random number generator and place a survey card on every sixth seat beginning with the second seat. all the cards are returned as the audience leaves. they are using
The sampling method used here is systematic sampling.
What is systematic sampling?
To generate a representative sample from a population, systematic sampling is a probability sampling technique.An advantage of systematic sampling is that it does not necessitate a comprehensive population list in advance. A sort of probability sampling technique called systematic sampling involves choosing individuals from a broader population using random beginning points and defined intervals.Random systematic samples, linear systematic samples, and circular systematic samples are the three primary categories of systematic samples.Here , this scenario is systematic sampling since it entails choosing n at random and selecting every nth person in the audience starting at a random point.To learn more about systematic sampling , refer:
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The dot plot shows predictions for the winning time in the 200-meter sprint. The winner finished the race in 22.3 seconds. What is the greatest percent error among the predictions?
2.69%, is the required maximum percent error among the predictions.
Given,
The predicted winning time in 200 meter sprint shows in the dot plot
The winner finished the race in 22.3 seconds
We have to find the greatest percent error among the predictions;
Here,
The actual time to complete is 22.3 seconds.
22.9 seconds is the prediction that is the most off.
The difference is, 22.9 - 22.3 = 0.6 seconds
To obtain a prediction, divide this by the actual time value.
= 0.6/22.3 = 0.0269 = 2.69
Therefore, 2.69%, is the required maximum percent error among the predictions.
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The length of a rectangle is twice its width. If the area of the rectangle is 162in^2, find its perimeter.
We know that the length of a rectangle is twice its width. Then:
The area of a rectangle is the product of its width and length. Then:
[tex]A=2x\cdot x=2x^2[/tex]Additionally, we know that the area is 162 in². Using the expression above we can obtain the value of x:
[tex]\begin{gathered} 162=2x^2 \\ 81=x^2 \\ x=9\text{ in} \end{gathered}[/tex]Finally, the perimeter (2P) is just twice the sum of the width and the length of the rectangle:
[tex]2P=2\cdot(2x+x)=6x=6\cdot9=54\text{ in}[/tex]Find the slope of the line that passes through (4,2) and (2,1)
Given
Points (4,2) and (2,1)
Find
Slope of the line
Explanation
Slope of line is given by
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]so ,
[tex]\begin{gathered} m=\frac{1-2}{2-4} \\ \\ m=-\frac{1}{-2} \\ \\ m=\frac{1}{2} \end{gathered}[/tex]Final Answer
Hence , the slope of line is m = 1/2
PLEASE HELP
Question
A function f(x) is graphed on the coordinate plane.
What is the function rule in slope-intercept form?
f(x)=
The graphed function in the slope-intercept form can be written as:
y = -4*x - 2
How to get the linear function?
A general linear function in the slope-intercept form is written as:
y = m*x + b
Where m is the slope and b is the y-intercept.
On the graph, we can see that our line intercepts the y-axis at y = -2, so the y-intercept is b = -2, replacing that we get:
y = m*x - 2
We also can see that the line passes through (-1, 2), replacing these values on the linear equation we get:
2 = m*(-1) - 2
m = -2 - 2
m = -4
Thus, the linear function in the graph is:
y = -4*x - 2
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