What is the area of this triangle?
a=bh2

17 m²
30 m²
60 m²
120 m²

right triangle with height labeled 12 meters, base labeled 5 meters, and third side labeled 13 meters.

the triangle has 13m to the right 12m to the left and 5m on the bottom !

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%