Point Ris between Q and S. If QS = 155, what is QR?*
Help needed?

Which math sentence can be used to determine if the triangle is a right triangle?

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?

Anyone know? is appreciated! will mark brainliest if correct!