Help pls. I need help on math

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

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 the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?