meramera50
19.06.2020 •
Mathematics
Please answer this correctly
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Ответ:
A ≈ 3.25 in squared
Step-by-step explanation:
So we can work backward using the perimeter of a circle formula to find the radius.
Perimeter of a whole circle: C = 2* 3.14 * r
Since we are only given a quarter of the perimeter we need to multiply the 3.57 by 4 to find C.
C = 14.28
Now we can solve for r using algebra.
Multiply 2 and 3.14
Isolate r through division.
Now that we have the radius of the circle we can plug that into the area of a circle.
Formula:
Plug in and solve.
A = 16.2355 in squared
This however is the area of the whole circle it is just looking for a quarter.
So we can divide the area of the whole circle by 4 to find the final answer.
16.2355 / 4 = 3.2471
Now round to the nearest hundreds which is the second number after the decimal.
A ≈ 3.25
Ответ: