Picture included ^ ( BRAINLIEST)

What is the value of the expression below? (81^2)^1/8

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 a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.