Do you times two by the radius to equal diameter? I need to make sure.

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

17 in long 1.3 ft wide and 8in high what is the volume

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68