Write an equation of the cosine function with amplitude = 100, period = 45, vertical shift =-110 and reflected over x-axis. please help

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 value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Find │–14│ a. 14 b. –14 c. start fraction 1 over 14 end fraction