1.6% change in the level of oxygen for each 1000 feet of level change.
let the oxygen level at ground be x
so the oxygen level at 2000 feet above sea level is 0.18x
ans the oxygen level at 4500 feet above sea level is 0.14x
so total change = 0.04x for 2500 feet
so per feet height change = 0.04x/2500
for every 1000 feet of elevation change the percentage change is given by = (0.04*1000)/2500
=> 0.016x
so percentage change = 0.016x/x * 100
=> 1.6 %
so for every 1000 feet 1.6% change in the oxygen level is observed at that elevation.
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For every 1000 feet of elevation variation, the oxygen level changes by 1.6%.
In most cases, elevation is used to describe locations on the surface of the Earth, whereas altitude or geopotential height is used to describe locations above the surface, such as those of flying airplanes or orbiting satellites, and depth is used to describe locations below the surface.
Let the ground's oxygen level be x.
the oxygen concentration is 0.18x at 2000 feet above sea level.
ans the oxygen concentration is 0.14x at 4500 feet above sea level.
hence the overall change for 2500 feet is 0.04x.
as a result, per foot height change, 0.04x/2500
The formula is (0.04*1000)/2500, where 1000 feet of elevation change equals 1000 feet of change in percentage.
=> 0.016x
Consequently, % change = 0.016x/x * 100.
=> 1.6 %
Therefore, at that elevation, there is a 1.6% variation in the oxygen level for every 1000 feet.
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A university class has had 18 adult education students enroll so far, as well as 18 other students. Considering this data, how many of the next 14 students to enroll should you expect to be adult education students?
The number of next 14 students that will be expected to be adults education students would be = 7 adult education students.
Who is an adult education student?An adult education student is the student that is undertaken by individuals that are mature men and women who take course for continuing education.
The first enrollment consist of the following;
Adult education student = 18
other = 18
Total for first enrollment = 18+18 = 36
If first 36 enrolled students = 18 adult students
second 14 enrolled students = X adults
Make X the subject of formula;
X adults = 14× 18/36
= 252/36
= 7
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question 1 a number increases by 10%, and then decreases by 10%. will the result be greater than, less than, or equal to the original number
The number is decreased by 1%.
Now, According to the question:
Let the number be 100
Number is increased by 10% = 100+10% of 100
=100+10
=110
Now, the resultant number is reduced by 10% =110-10% of 110
=110-11
=99
The number obtained is 99
Decrease in value = 100 – 99 = 1
Percentage decrease = 1100 × 100=1%
Hence, the number is decreased by 1%.
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4x+40=y
HELPPP PLEASE
Here we are given a right angled triangle in which there are two unknown angles x and y . we need to find out the values of x and y. Firstly, as we know that the angle sum property of a triangle is 180° . So that,
[tex]\longrightarrow x + y +90^o = 180^o\\[/tex]
[tex]\longrightarrow x + y = 180^o -90^o = 90^o \dots \\[/tex]
[tex]\longrightarrow y = 90^o - x \dots (i) \\[/tex]
And we also have,
[tex]\longrightarrow 4x + 40 = y \\[/tex]
from equation (i) , we have ,
[tex]\longrightarrow 4x + 40 = 90 - x \\[/tex]
[tex]\longrightarrow 4x + x = 90 +40 \\[/tex]
[tex]\longrightarrow 5x = 130\\[/tex]
[tex]\longrightarrow x =\dfrac{130}{5}\\[/tex]
[tex]\longrightarrow \underline{\underline{x = 26^o}} \\[/tex]
substitute this value in equation (i) ,
[tex]\longrightarrow y = 90 - 26 \\[/tex]
[tex]\longrightarrow \underline{\underline{y = 64^o}} \\[/tex]
And we are done!
Nick and Lauren hiked 3. 75 kilometers to a lake 45° east of south from their campsite. Then they hiked 30° west of north to the nature center 6. 5 kilometers from the lake. How many kilometers are they away from their campsite? Round to the nearest tenth
Answer:
Step-by-step explanation: 23.4
find the measure of each numbered angle
Each numbered angle has a measurement of 109°, 109°, and 71°, respectively.
What is angle?Two rays that come together at a vertex or node, also known as a common point, to produce an angle for any figure.
Angles are frequently expressed in degrees or radians.
Think about triangle
A triangle's internal angles add up to 180°.
URS, UVT, and URT add up to 180°.
35° + 36° + ∠1 = 180°
∠1 = 180° - (35° + 36°)
∠1 = 180° - 71°
∠1 = 109°
The angles 1 and 2 are now vertically opposed. This makes them equal.
∠2 = 109°.
For triangle NQO once more
∠2 + ∠3 + 35° = 180°
36° + ∠3 + 35° = 180°
∠3 = 180° - (35° + 36°)
∠3 = 180° - 109°
∠3 = 71°
As a result, 1, 2, and 3 are 109, 109, and 71 degrees, respectively.
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What is the diameter of a bowling ball that rolls 96 cm down the lane each time it turns once
The diameter of a bowling ball that rolls 96 cm down the lane each time it turns once is 16.58 cm
the term called diameter is known as the length of the line through the center that touches two points on the edge of the circle.
Here we know that the ball rolls 96 cm down the lane each time it turns once.
According to the formula of circumference, the total circumference is calculated by using the formula,
C = 2πr
Where the value of r is 96, then
=> c = 2 x π x 96
=> C = 192 x 3.14
=> C = 602.88
Here we have consider that the lane is 10000 cm in length , then the diameter is calculated as,
=> 10000/602.88
=> 16.58
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Find out angle p in degrees :)
The measure of angle P is 82°.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
125° and (109° + ∠N) are alternate angles.
Alternate angles are equal.
125 = 109 + ∠N
∠N = 125 - 109
∠N = 16
Now,
The sum of the triangle ABC is 180.
∠P + ∠M + ∠N = 180
Sides opposite to equal angles are equal.
∠P = ∠M
2∠P + 16 = 180
2∠P = 180 - 16
2∠P = 164
∠P = 164/2
∠P = 82
Thus,
∠P is 82°.
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How many ounces are in ten and half pounds?
Answer:
10 1/2 lbs = 168 oz
Answer:
168
Step-by-step explanation:
i think
Each of these circles represents a pizza cut into 10 equal slices, and the yellow slices are the ones eaten by Larry.
If Larry ate L of the total amount of pizzas, what is the value of L?
The percentage of the slices that were eaten will be 30%.
How to calculate the percentage?The percentage simply has to do with the a value or ratio which can be stated as a fraction of 100. It should be noted that when we want to we calculate a percentage of a number, we simply divide it and then multiply the value that is gotten by 100.
From the information, it should be noted that each pizza is divided into 10 slices. The total amount of slices eaten will be:
= 1 + 6 + 2
= 9
Total slices = 30
The percentage of the slices that were eaten will be:
= 9 / 30 × 100
= 30%
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PLS HELP 30 POINTS AND BRAINLIEST.......
ABC → A’B’C’ is a reflection. Use this to answer the questions below.
Triangle ABC is the preimage and triangle A'B'C' is the image. The equation for the line of reflection is x = 4.
What is Reflection?Reflection is a type of geometric transformation where the figure is flipped. In other words, a figure when undergoes reflection becomes it's mirror image.
(A) Pre image is the figure before reflection is done.
So the pre image is triangle ABC.
(B) Image is the reflected figure.
So the image is triangle A'B'C'.
(C) Coordinates of the output are :
A'(8, 9), B'(12, 4) and C'(8, 4)
(D) The line of the reflection is the parallel line to Y axis passing through 4 on the X axis.
So the equation is x = 4.
Hence triangles ABC and A'B'C' are preimage and image respectively. The coordinates for the output are A'(8, 9), B'(12, 4) and C'(8, 4).
The equation of the line of reflection is x = 4.
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Round each mixed number to the nearest whole number and then estimate the sum. 12 +2 11/14 5/7
16
13
14
15
(HELP FAST<3)
The rounding up of each of the 12 +2 11/14 5/7 mixed number to the nearest whole number then the estimatation of the sum can be expressed as A.16.
How can the sum be calculated?The concept here is addition of the fractions and the digits, In mathematics, summation is the process of adding a series of different types of numbers, known as addends or summands, to produce their sum or total.
The rounding up to whole number can be done as :
12 = 12.0
2 11/14 = 39/14 = 2.786= 3.0
5/7 = 0.71=1.0
Then the sum = 12+3+1=16
Therefore, option A is correct.
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At the end of an advertising campaign, weekly sales amounted to $25,000 and then decreased by 10% each week after the end of the campaign. A. Write the equation of the exponential function that models the weekly sales. B. Find the sales 6 weeks after the end of the advertising campaign
The final amount after a certain rate of decrease over a period of time can be calculated by Xₙ = X₀ (1-r)ⁿ. From calculations the sales after 6 weeks are 13286.025.
If the percent increase or decrease, period of time and initial amount are given, the final amount can be calculated using the equation Xₙ = X₀ (1±r)ⁿ. Here the percentage decrease is given. So the equation is
Xₙ = X₀ (1-r)ⁿ
Xₙ is the final amount
X₀ is the initial amount
r is the rate
n is the period of time
Here percent is given as 10%. So the rate, r = 10/100 = 0.10
Xₙ = X₀ (1-r)ⁿ
= 25000× (1-0.10)⁶
= 13286.025
So the sales after 6 weeks are 13286.025
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Given that mLKN=145°, find the mLKM and mMKn
Answer: ∠LKM=56° and ∠MKN=89°
Step-by-step explanation:
Notice that ∠LKM and ∠MKN make up ∠LKN. That means ∠LKM and ∠MKN combines equals 145°.
2x+10+4x-3=145 [combing like terms]
6x+7=145 [subtract both sides by 7]
6x=138 [divide both sides by 6]
x=23
We are almost done. We still need to plug it in to find the angle values.
∠LKM
2x+10 [plug in x=23]
2(23)+10 [multiply]
46+10 [add]
56
∠LKM=56°
------------------------------------------------------------------------------------------------------------
∠MKN
4x-3 [plug in x=23]
4(23)-3 [multiply]
92-3 [subtract]
89
∠MKN=89°
Therefore, ∠LKM=56° and ∠MKN=89°.
GEOMETRY 9.3.5 POINT ON A CIRCLE JOURNAL ASSIGNMENT
FULL DOCUMENT PLS
Suppose that this grid represents the customer’s yard. The bottom left corner is the origin point, (0, 0), and the x- and y- axes represent the two fences. The rose bush is at point (16, 18).
the solution of the given problem of coordinates comes out to be the coordinate P = (7, 0.4).
How do coordinates work?A coordinate system is a technique used in geometry to precisely locate points or other topological objects on a continuum, such as Euclidean space, using one or more numbers or coordinates. A point or item on an a double plane is located using a pair of integers known as coordinates. The x and y positions are two integers that describe a point's location on a 2D plane.
David want to find the coordinate are a useful tool for segmenting lines into smaller units.
P's coordinate is P = (7, -0.4)
The criteria are as follows:
A = (8,0)
=> B = (3,-2) (3,-2)
m: n=1:4
Using P = mx2+nx1 my2+ny
m+n
m+n, line ratio is computed.
The result is:
P 1x3+4x8 /1x-2+4x0 = 1+4 / 7
=> P = 35, 2
=>P = (7, -0.4) (7, -0.4)
1+4
P therefore has the coordinate P = (7, 0.4).
Therefore , the solution of the given problem of coordinates comes out to be the coordinate P = (7, 0.4).
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Question 1 (2 points) ✓ Saved
Emilio has a bank account that pays 4% interest each year. He has $200 in his
account. How much interest will he earn after 1 year?
$10
$6
$4
$8
2.10
The sum of $4 500 is divided among Anesha. Sian and Joanne. Sian received half, Anesha received $1050 and Joanne received the remainder. Calculate:
(a) Sian's share
(b) Joanne's share
(c) the ratio in which the $4500 was divided among the three persons
(d) the percentage of the total amount that Anesha received.
Answer:
a: 2250. b: 1200. c: 5:2.3:2.7 d: 23.3%
Step-by-step explanation:
Sian gets 1/2 so 4500/2 = 2250
Anesha = 1050
Joanna = 2250-1050 = 1200
Use point-slope form to write the equation
of a line that passes through the point
(11, 18) with slope 3.
By using the point-slope form, the equation of a line that passes through the point (11, 18) with slope 3 is equal to y - 18 = 3(x - 11).
What is the point-slope form?Mathematically, the point-slope form of a straight line can be calculated by using this mathematical expression:
y - y₁ = m(x - x₁)
Where:
m represents the slope.x and y represents the data points.From the information provided above, we have the following slope and data points on the line:
Points = (11, 18).Slope, m = 3At data point (11, 18), a linear equation of this line can be calculated in point-slope form as follows:
y - y₁ = m(x - x₁)
y - 18 = 3(x - 11)
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Question 1 of 10
Which algebraic expression represents this word description?
The quotient of nine and the sum of a number and one
O A. 2+1
B. z1
C. +1
OD. +1
An algebraic expression which represents this word description "The quotient of nine and the sum of a number and one" is: D. 9 over x+1.
What is a quotient?In Mathematics, a quotient can be defined as a mathematical expression that is simply used to represent the division of a number by another number.
In order to translate this word problem into algebraic equation, we would assign a variable to the unknown number and then translate the word problem into algebraic equation as follows:
Let the variable n represent the unknown number.
Translating the word problem into an algebraic equation, we have the following;
Quotient = 9/(x + 1)
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Complete Question:
Which algebraic expression represents this word description?
The quotient of nine and the sum of a number and one
A. x+1 over 9 B. 9/x +1 C. x/9 +1 D. 9 over x+1
Solve the inequality and write the solution in set-builder notation.
b+2≥4
The set builder notation for the given inequality is [tex]\left \{ {{b | b \geq 2\right \}[/tex].
What is set builder notation?The answer set of an inequality is expressed in mathematics using a set builder notation. For instance, the set builder notation is understood to mean the collection of all y, where y is bigger than 0.
What is inequality equation?Mathematical expressions with inequalities are those in which the two sides are not equal. Contrary to equations, we compare two values in inequality. Less than, larger than, or not equal to signs are used in place of the equal sign.
The given inequality is:
b + 2 ≥ 4
Subtract 2 on both sides of the equation:
b + 2 - 2 ≥ 4 -2
b ≥ 2
Hence, the set builder notation for the given equality is [tex]\left \{ {{b | b \geq 2\right \}[/tex].
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determine if the three side lengths form a right triangle. 15, 8, 7
yup
Step-by-step explanation: the triplets of 15,8,7 make a right triangle
u can also add 8 squared and 7 squared and if it equals to 15 squared then it’s right
Pick one of the two companies and sketch a normal curve for a be sure to label it and use vertical lines to locate the mean and one standard deviation on either side of the mean
The sketch a normal curve is attached below and in Normal Curve with mean of 50 and a Standard Deviation of 2.
The term normally curve in math is defined as a normal distribution is proper term for a Probability bell curve.
While we looking into the question we know that here from the Right of Normal standard curve we have to draw 3 vertical lines. And these lines would count up by 2 for each standard deviation 52, 54,56.
And then we have to plot from the Left of Normal standard curve, and then draw 3 vertical lines. And those lines would count up by 2 for each standard deviation 48,46,44.
Thus Normal standard curve extends indefinitely in both directions, and by approaching on the other hand it never touching the horizontal axis as it does so.
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Where do you stash your allowance, birthday cash or paycheck? There are lots of ways to keep your money safe, but knowing which option is best for you means researching your choices. After the videos watched in class, write down four facts that you learn about each type of institution below. Watch the videos twice if needed to fill in the chart. Then, decide which one you would choose to put your money in and why.
I stash my allowance, birthday cash or paycheck in a bank.
The facts about Banks include the following:
They are profit oriented.They accepts deposits with a lower interest rate.They give loan at a higher rate.They provide a larger range of services.The facts about Credit union include the following:
They are not profit oriented.They accepts deposits with a higher interest rate.They give loan at a lower rate.They provide a smaller range of services.What is a Credit union?These are non profit organizations that exist to serve their members and offer some banking services.
They accepts deposits with a higher interest rate and give loan at a lower rate which is why my decision in where to put my money will be in a credit union due to the high interest rate.
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(ii) Hence, given that 6log 3+7-3 log, a = 0, find the possible values of a.
Answer: Given that 6log3 + 7 - 3loga = 0, we can start by isolating the variable a. To do this, we'll add 3loga to both sides:
6log3 + 7 = 3loga
Next, we'll divide both sides by 3:
2log3 + (7/3) = loga
Now we have loga on one side of the equation and a constant on the other. To find the possible values of a, we'll need to use the properties of logarithms.
We know that logb(x) = y is equivalent to b^y = x, so we can rewrite the equation as:
a = 3^(2log3 + (7/3))
To find the possible values of a, we'll need to evaluate the exponent on the right side of the equation. Since we don't know the value of log3, we can't find the exact value of a. However, we can say that the possible values of a are all the values that can be expressed as 3 raised to the power of (2log3 + (7/3))
Step-by-step explanation:
Use mental math to find a solution for 2/8 = 3/x+2
Answer:
answer - x = − 12/7
A three-column table is given. Part 10 B D Part 12 30 60 Whole A C 102 What is the value of C in the table?
According to the information in the table, the value of C is 51.
How to find the value of C?To find the value of C we must calculate the constant, for that we have to perform the following operation:
constant = whole / partconstant = 102 / 60In this case, we use the values of another column to identify the constant that applies to all the values in the table and the result is the following:
constant = 1.7Additionally, to find the value of C we must perform the following operation:
whole = part * constantwhole = 30 * 1.7whole = 51According to the above, the value of C is 51.
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Please help !!
Find the slope of the line y = -x + 20 and the slope of a line perpendicular to it.
Enter the correct values in the boxes.
Slope of the given line:
Slope of a perpendicular line:
The slope of the linear line given by linear equation y= -x+20 is -1
and the slope of line perpendicular to it is 1.
what is a linear equation?
A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation. The standard form of a linear equation in one variable is of the form
Ax + B = 0
e.g. x-10=0. Here, x is a variable, A is a coefficient and B is constant.
The standard form of a linear equation in two variables is of the form
Ax + By = C
e.g. 2x-4y=10. Here, x and y are variables, A and B are coefficients and C is a constant.
Now as equation of linear line is y=mx+c
where m=slope, c=constant
For y=-x+20
slope(m)= -1
also for perpendicular lines m1.m2=-1
-1.m2=-1
m=1 (slope of line perpendicular to it)
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Which of the following inequalities matches the graph?
graph of an inequality with a dashed line through the points 0, 3 and 1, 9 with shading above the line
−6x + y < 3
6x + y < 3
6x − y < −3
The correct inequality is not listed
Answer: The correct inequality that matches the graph is 6x + y < 3.
This inequality can be graphed by plotting the points (0,3) and (1,9) as the boundary of the solution set, and shading the area above the line. The graph will be a line with a negative slope that pass through the points (0,3) and (1,9) and the shaded area will be above the line, which match the graph you have described.
We can check this by plugging the points (0,3) and (1,9) into the inequality to see if they satisfy it:
6(0) + 3 < 3 => 3 < 3 which is true
6(1) + 9 < 3 => 6 + 9 < 3 which is false
This confirms that the inequality 6x + y < 3 matches the graph.
Step-by-step explanation:
HELPPP PLSSS IM STRUGGLING!!!
Answer:
10;37°
Step-by-step explanation:
Pythagoras theorem will be used to find the length of EF and the knowledge of complementary angles will be used to solve for angle D
Both circles have the same center. The circumference of the inner circle is 100.48 kilometers.
What is the area of the shaded region?
13 km
O
C=100.48 km
Vic
The area of the shaded region of the circle is 1836.9 km².
How to find the area of the shaded region?Both circles have the same centre. The circumference of the inner circle is 100.48 kilometres. The circumference of a circle is the perimeter of the circle.
Therefore, the area of the shaded portion can be calculated as follows:
Hence,
circumference of the inner circle = 2πr
100.48 = 2 × 3.14 × r
100.48 = 6.28 r
r = 100.48 / 6.28
r = 16 km
Therefore,
area of the inner circle = πr²
area of the inner circle = 3.14 × 16²
area of the inner circle = 803.84 km²
area of the outside circle = πr²
area of the outside circle = 3.14 × (16 + 13)²
area of the outside circle = 3.14 × 29²
area of the outside circle = 2640.74 km²
Therefore,
area of the shaded region = 2640.74 - 803.84
area of the shaded region = 1836.9 km²
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Which number is rational and a real number, but not an integer?
A. √2
OB. -5
5
O c. 9/10
OD. There is no such number.
Option (c) is the correct option.
9/10 is rational and a real no. but not an integer.
What is a rational number?
A number with the form p/q, where p and q are integers and q is not equal to 0, is said to be rational.
What is an integer?
In the category of real numbers are irrational numbers, fractions, and rational numbers like positive and negative integers.
What is a real number?
Integers, which can be both negative and positive and include zero, are numbers without a decimal or fractional component.
Our objective is to find a number which is rational and a real number but not an integer.
√2 is not rational and not a real number.
-5 is rational and a real number but It is an integer.
9/10 is rational and a real number and also not an integer.
Hence, (c) is the correct option.
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