In triangle UVW, the measure of angle W=90°, the measure of angle U=15°, and VW=81 feet, Find the length of WU to the nearest tenth of a foot.

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.