in order for the table below to show exponential decay, What must the value of d be in the table below

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

Use the graph of the sine function y=2sinθ shown below

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?