katerin4738
10.03.2021 •
Mathematics
What is the radius of a circle that has a circumference of 81 π square inches?
A. 9 inches
B. 18 inches
C. 40.5 inches
d. 81 inches
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Ответ:
r≈12.89
Step-by-step explanation:
Using the formula
C=2πr
Solving for r
r=C
2π=81
2·π≈12.89155
Ответ:
Step-by-step explanation:
Because this circle has a center at (-3,-2) and a radius of 1, the equation is
. Hope this helps!