3. A waitress earns 15% in gratuity on the total price of her customer's meals. She also earns $5 per hour. If the waitress's customers spend $200 on food and the waitress
works for 4 hours, how much would she earn in total?
a) $30
b) $50
c) $230
d) $250

Jessica is a custodian at oracle arena.she waxes 20 m2 of the floor in 3/5 of an hour. jessica waxes the floor at a constant rate.at this rate how many sqaures meters can she wax per hour

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

Find two numbers if their sum is 91 and the ratio is 6: 7?