Question

1. Find the circumference of the given circle. Round to the nearest tenth.

(1 point)
22.0 cm
38.5 cm
11.0 cm
42.8 cm

Answer 1

this is picture below!!!

Answer 2

See , area of a circle,A = pi*r^2 , where r is radius
also note that
dA/dr = circumference
So, differentiate both sides to obtain an expression for circumference, tell me what do you get?

Answer 3

Do you know the formula for circumference of a circle is:\[C=\pi d\]

Answer 4

The diameter is twice the radius so multiply the radius (which is 3.5) by 2 and multiply that answer y 3.14 and round to the nearest tenth.

Answer 5

udk?omg!