The function f ( r ) = π r 2 determines the area of a circle in cm2, A , in terms of the radius of the circle in cm, r . Define a function g that determines the radius of a circle in cm, r , in terms of the area of the cirlce in cm2, A .

Step-by-step explanation:

The function to find the area of the circle is

we need to frame equation for the radius of the circle in terms of area

Lets replace f(r) by A  

Solve the given equation for 'r'

To solve for 'r' , divide both sides by pi

then take square root on both sides

Now replace 'r' with f(A), the radius in terms of the area of the circle

all the angles opposite to the angle 150 would be 150 and all the angles that are next to 150 are 30 because they equal 180 it you add it up.

step-by-step explanation: