The volume v of a cube with sides of length x in. is changing with respect to time. at a certain instant of time, the sides of the cube are 4 in. long and increasing at the rate of 0.5 in./s. how fast is the volume of the cube changing (in cu in/s) at that instant of time?

Melissa is purchasing a $160,000 home and her bank is offering her a 30-year mortgage at a 4.9% interest rate. in order to lower her monthly payment, melissa will make a 20% down payment and will purchase 3 points. what will her monthly mortgage payment be? a. $645.98 b. $650.46 c. $662.93 d. $606.69