Find the Value of each variable using sine and cosine. Round your answers to the nearest tenth.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122