GPAs of freshman biology majors have approximately the normal distribution with mean 2.87 and standard deviation .34. In what range do the middle 90% of all freshman biology majors' GPAs lie?

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%

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1