At a pizzeria one day, 15% of the pizzas sold were topped with mushrooms. if 12 pizzas were topped with mushrooms, what was the toal number of pizzas sold that day?

What is the value of r of the geometric series?

Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $40.00, how much money is angela saving on the dress? a. $0.80 b. $3.20 c. $32.00 d. $8.00

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?