A cone has a base area of 2424 square inches and a height of 88 inches. What is the area of a cross-section of the cone that is parallel to the base and 33 inches from the vertex? (show steps)

The area of the cross-section of the cone that is parallel to the base and 33 inches from the vertex is square inches.

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?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

How to do this , and can some one explain