Please help me i hope its enough points for you

Three coins are flipped. what is the probability that there will be at least two tails?

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?

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol