Can anyone explain this to me?

The graph of g(x) is a translation of y = which equation represents g(x)?

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

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%