For #11 you add 54 + 59+ 57+ 54. Then you have 224. Then divide 224 by 4 since there are 4 numbers. Your answer should be 56 inches as the average, or mean.
Remember, when you divide, you divide by the number of all the numbers. I'm trying to make sense but hope this helps!
Prime number
It can only divide by the number itself and 1.
Answer:
36.7 degrees. A straight line is 180 degrees.
Step-by-step explanation: