Mr jenkins invested $7500 at his local bank at 6.5% simple interest per annum, what was his investment worth at the end of the first year

The answer is 7.2 how would you put this as money

Asingle die is rolled twice. find the probability of rolling a 3 the first time and a 2 the second time

The half-life of a certain material is 0.002 second. approximately how much of a 14-gram sample will be left after 0.004 second? a. 12 grams b. 3.5 grams c. 0.06 gram d. 7 grams