Mt& a uses the function f(x)=475-15x-15x. to depreciate smart phones. where f represents the value of smart phone and x represents the number of months since its purchase.
a) find f^-1 and explain what it represents in this situacions
when will the deprecated value of smart phone be less than $100.00?
what does x represent in f^-1(x) =30? what is the value of x?
graph f(x) and f^-1 (x) on the same coordinate

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?