jessica has $70,000 in the bank and is earning 5% compounded monthly. She plans to purchase a used car, for which the down payment is $500 and the monthly payments are $280.

The volume of a spherical hot air balloon v(r) = 4 3 ? r3 changes as its radius changes. the radius is a function of time given by r(t) = 3t. find the instantaneous rate of change of the volume with respect to t at t = 2.

Suppose medical records indicate that the length of newborn babies (in inches) is normally distributed with a mean of 20 and a standard deviation of 2.6. find the probability that a given infant is between 14.8 and 25.2 inches long.

A. 530 ft^2 b. 500 ft^2 c. 470 ft^2 d. 450 ft^2