Carmita bought 20 pizzas for a party. An hour after the party started, Ķ of the pizzas had been eaten. How many pizzas had been eaten?

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

The trigonometric ratios sine and secant are reciprocals of each other

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?