Grapes are 3.88 per pound. Marco buys 1.89
pounds. What is the total cost of his purchase?

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

If the tip varies directly with the number of guest which equation represents between the tip, t, and the number of guest, g?