4. The speeds of random vehicles along a stretch of highway is recorded. {50, 74, 65, 58, 71, 65, 61, 68, 55, 72, 81, 60} Calculate the z-scores for each of the following:

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

What are the values of a, b, and c in the quadratic equation 0 = x2 – 3x - 2? a = 1, b = 3, c = 2 a=, b = -3,c=-2 a = 1, b = 3, c= 2 a = 1.0= -3, c = 2

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?