How many triangles can be constructed with angles measuring 50,90,40

Can you decompose the numbers 20,740,6,000

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

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?