What's from least to greatest? or how do i simplify these?

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.

What is the domain of the of the exponential function shown below?