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Alenkinab [10]
2 years ago
5

A student sells wrapping paper for $5 per roll and sells 40 rolls. The cost to make the wrapping paper rolls is $3. What is the

student’s profit from selling 40 rolls of wrapping paper? Show the math you used to reach this answer.
Mathematics
1 answer:
xz_007 [3.2K]2 years ago
3 0
40x5=200
3x40=120
200-120=80
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Im stuck on this problem. Please explain how you got your answer​
klemol [59]

The function y=0.3^x represents exponential growth with the initial value equal to 1, the decay factor equal to 0.3, and the rate equal to 0.7.

<h3>Population Growth Equation</h3>

The formula for the Population Growth Equation is:

P_f=P_o*(1+\frac{R}{100}) ^t

           

Pf= future population

Po=initial population

r=growth rate

t= time (years)

growth or decay factor =  (1 ±r)

When 1+R  > 1, the equation represents growth, while 1+R < 1 the equation represents decay.

The question gives:

y=0.3^x, then

Pf=y

Po= 1  

(1+\frac{R}{100}) =0.3 , thus

(100+R}) =30\\ \\ R=-100+30\\ \\ R=-70

r= -70%= -0.7

decay factor= (1-0.7)=0.3

Therefore,

1+R will be = 1+(-0.7)=1 - 0.7 =0.3

When 1+R >1, the function represents exponential growth.

Read more about the exponential function here:

brainly.com/question/8935549

4 0
2 years ago
Beth wants to buy a radio for $36. She<br> gives the cashier $40. What is her<br> change?
kow [346]
Her change is $4
40-36=4
5 0
3 years ago
Read 2 more answers
Please help me with number ten and twelve
jasenka [17]

Answer: 93,\ 34^{\circ}

Step-by-step explanation:

Given

For figure (i) both triangles are congruent

\therefore 8x-27=4x+33\\\Rightarrow 8x-4x=33+27\\\Rightarrow 4x=60\\\Rightarrow x=15

\Rightarrow PQ=8x-27\\\Rightarrow PQ=93

For figure (ii)

Two triangles WXZ and WZY are congruent

\therefore 9x-28=5x-8\\\Rightarrow 4x=20\\\Rightarrow x=5^{\circ}\\\Rightarrow \angle YWX=2(9x-28)\\\Rightarrow \angle YWX=2(17)\\\Rightarrow \angle YWX=34^{\circ}

5 0
2 years ago
HELP ITS HARD PLZZZ need help to 1 throw 6
Nata [24]
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3 0
3 years ago
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The lines below are parallel. If the slope of the green line is -4, what is the slope of the red line?
kodGreya [7K]

Answer:

-4

Step-by-step explanation:

<em>Hey there!</em>

<em />

Well the slopes of 2 parallel lines have the same slope,

meaning if the green line has a slope of -4 then the slope of the red line has a slope of -4.

<em>Hope this helps :)</em>

5 0
3 years ago
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