What is an easier way on how to do this?

Yoku is putting on sunscreen. he uses 2\text{ ml}2 ml to cover 50\text{ cm}^250 cm 2 of his skin. he wants to know how many milliliters of sunscreen (c)(c) he needs to cover 325\text{ cm}^2325 cm 2 of his skin. how many milliliters of sunscreen does yoku need to cover 325 \text{ cm}^2325 cm 2 of his skin?

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5

Tom drove 206 miles in 3.9 hours. estimate his average speed.