Sales tax is calculated

a. based on the number of items purchased.

b. using a percentage of the price of an item.

c. before a sale discount is applied.

d. as a percentage based on federal law.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.