What is the measure of each interior angle of a regular octagon?​

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Rewrite so the subject can be y in the formula d=m-y/y+n

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25