Which expression is always equivalent to sin x when 0° < x < 90° ? Anwser choices in the picture below

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

Meg constructed triangle poq and then used a compass and straightedge to accurately construct line segment os, as shown in the figure below, which could be the measures of angles pos and angle poq?