How to find the maximum area of a rectangle inscribed in a parabola?

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?