What is 21,253 to the nearest hundreds

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?

If you are just building your payment history, how many points from a perfect score will you possibly miss?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).