X divided by -1.5 is 21! what is x! help me please!!

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

Apple pie is removed from 350 degree oven. temperature of the pie t minutes after being removed id given by the function t(t)=72+268e-0.068t