Ben is buying a refrigerator that cost $849. if the sales tax rate is 8 %, how much tax will ben have to pay on the refrigerator

A50% increase followed by 33 1/2% decrease

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?

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)