A rectangular pyramid and a rectangular prism have the same base measurements and
height measurements. If the volume of the prism is 30 cubic inches,
what is the volume of the pyramid? To check if you answer is
reasonable, think about which shape is bigger.

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?