What’s is this I’m on polyhedra plz help?

Ashopper bought a watermelon a pack of napkins and some paper plates in his state there was no tax on food the tax rate on non-food items is 5% the total for the three items he bought was 825 before tags and he paid $0.19 in taxes how much did the watermelon cost

Witch represents the inverse of the function f(x)=1/4x-12

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute