m4167281
17.11.2020 •
Mathematics
How many inches are in 7 in 1/2 feet
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Ответ:
90 inches are in 7 1/2 feet
Ответ:
18 pi inches
Step-by-step explanation:
The area of a circle is
A = pi r^2
81 pi = pi r^2
81 = r^2
Taking the square root of each side
9 = r
We can now find the circumference
C = 2 * pi *r
C =2 * pi *9
C = 18 pi