Can someone answer this today?

Perform the required operations on the following functions given: f(x)= 3-x; g(x)= -2x find g[f(x)]

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Find the balance at the end of 4 years if 1000 is deposited at the rate of