Multiplication patterns with decimals

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

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents