Find the area of the circle with a circumference of 30π . write your solution in terms of π and round to the nearest hundredth.

area in terms of π:

answer choices:

Hi again.

Answer

= option d, 225π mm^2

Circumference = 2πr

30π = 2πr

30 = 2r

30 / 2 = r

15 = r

Area = π

π

225π

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)