Mean = (14 + 16 + 7 + 9 + 11 + 13 + 8 + 10) ÷ 8 = 11
Variance =
[ (14-11)²+(16-11)²+(7-11)²+(9-11)²+(11-11)²+(13-11)²+(8-11)²+(10-11)² ]/7 = 9.71
Answer: 9.71
The range of communication is about 55 meters.
Answer:
125
Step-by-step explanation:
Divide 50 by the 4 acres which is 12.5, then times 12.5 by 10 acres.
Answer:
B
Step-by-step explanation:
Answer:
(4 , 3 ) and (-3 , -4)
Step-by-step explanation:
Other two vertices will be in 1st quadrant and 3 rd quadrant