Answer:
<u>11</u>
Step-by-step explanation:
The mean is the average. To find the average, add up all the numbers, then divide by the amount of numbers there are. 13 + 5 + 11 + 8 + 14 + 15 = 66. There are 6 numbers. 66 divided by 6 = <u>11.</u>
11 is your mean
The answer to he question is C) 9/20.
i got 6.70820393
8.87
The square means "right angle"