A radio station has a broadcast area in the shape of a circle with equation x^2 + y^2 = 5,625, where the constant represents square miles.
a. Graph the equation and state the radius in miles.
b. What is the area of the region in which the broadcast from the station can be picked up?

Question

A radio station has a broadcast area in the shape of a circle with equation x^2 + y^2 = 5,625, where the constant represents square miles.
a. Graph the equation and state the radius in miles. 
b. What is the area of the region in which the broadcast from the station can be picked up?

raden · Answer

x^2 + y^2 = 5,625
x^2 + y^2 = (75)^5
that is the circle equation with the center at the original point (0,0) and its radius = 75

anonymous · Answer

oh, I was way off on how I was going to solve this.

raden · Answer

to get area of that circle, use the formula :
area = pi * r * r
u just put r=75

anonymous · Answer

ok, why I think I did that one correct than. Thank you very much.

raden · Answer

you're welcome

johnweldon1993 · Answer

little typo mistake....

x^2 + y^2 = (75)^5
should be
x^2 + y^2 = (75)^2

johnweldon1993 · Answer

doesn't change anything...just a typo mistake

raden · Answer

thanks  johnweldon :)

johnweldon1993 · Answer

no problem :)