Answer:
Option A. 
Step-by-step explanation:
we know that
The measure of the inner angle is the semi-sum of the arcs comprising it and its opposite.

substitute the values


Yes the answer is ymb=y your welcome
Answer:
4
Step-by-step explanation:
Mean = sum of scores /number of scores
We have four scores given ,so, the sum of the scores given will be divided by the number of scores which is 4
(4*4*10)*3
160*3=480
(5*3*10)*2
150*2=300
480+300=780 cub. meters