A trebuchet launches a projectile on a parabolic arc from a height of 47 ft. at a velocity of 40 ft/s. Determine when the projectile will first reach a height of 60 ft. and how many seconds later it will again be at 60 feet. Round to the nearest tenth. First time to reach a height of 60 feet:
seconds

Second time to reach a height of 60 feet:
seconds

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?