Y=2000(1.04)^x does this represent growth or decay and what is the increase or decrease percentage

How to write 3 tenths and 5 tenths as a decimal

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

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%