The Gamez family goes out for dinner and the price of the meal is $63. The sales tax on the meal is 6.5% and they leave a 20% tip on the pre-tax amount. What is the total cost of the meal?

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)