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dedylja [7]
3 years ago
11

If the circumference of a circle is 5 Pi CM what is the area of the circle in the terms of Pi

Mathematics
1 answer:
gtnhenbr [62]3 years ago
7 0

Answer:

6.25pi

Step-by-step explanation:

If the circumference is 5pi, then the radius has to be 2.5

Plug that into the area of a circle formula, (pi)(r^2) so your answer is 6.25pi.

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HELP 100 POINTS The population of a city is modeled with the function P=250,000e^0.013t​, where t is the number of years since 2
erma4kov [3.2K]
Pretty difficult problem, but that’s why I’m here.
First we need to identify what we’re looking for, which is t. So now plug 450k into equation and solve for t.
450000 = 250000e^0.013t
Now to solve this, we need to remember this rule: if you take natural log of e you can remove x from exponent. And natural log of e is 1.
Basically ln(e^x) = xln(e) = 1*x
So knowing this first we need to isolate e
450000/250000 = e^0.013t
1.8 = e^0.013t
Now take natural log of both
Ln(1.8) = ln(e^0.013t)
Ln(1.8) = 0.013t*ln(e)
Ln(1.8) = 0.013t * 1
Now solve for t
Ln(1.8)/0.013 = t
T= 45.21435 years
Now just to check our work plug that into original equation which we get:
449999.94 which is basically 500k (just with an error caused by lack of decimals)
So our final solution will be in the 45th year after about 2 and a half months it will reach 450k people.
6 0
2 years ago
Write an equation of the line that passes through the pair of points (5, 8) and<br> (9, 16).
SashulF [63]

Answer:

D: y = 2x - 2

Step-by-step explanation:

1. \frac{16-8}{9-5} = 2

2. y = 2x + b

3. Insert the points into the equation: 8 = 10 + b

4. b = -2

5. y = 2x - 2

6 0
2 years ago
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You have to calculate percent from the original price. Try it and show the results.
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X=3

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