Aschool uniform for boys consists of black or gray slacks, a short-sleeve or long-sleeve white button-down shirt, and a red, blue, or green tie. how many possible combinations of slacks, shirt, and tie does the school uniform allow?

What is this equation in point-slope form?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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?