Asavings account compounds interest, at a rate of 22%, once a year. george puts $750 in the account as the principal. how can george set up a function to track the amount of money he has?

a. a(x) = 750(1 + .22)x where .22 is the interest rate
b. a(x) = 750(22)x where 22 is the interest rate
c. a(x) = 750(.22)x where .22 is the interest rate
d. a(x) = 750(1 + 22)x where 22 is the interest rate

Three times the sum of a number and seven is negative thirty-six. what is the number?

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

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?