Answer:
17.3
Step-by-step explanation:
area of paralellogram=base x height
height=sin(60) x 4= 
area = 5 x 
=
= 17.3(to nearest tenth)
To find the average, add them all up. 13 + 7 + 12 + 9 + 8 + 8 + 16 = 73
Then divide by how many numbers there are, 73 divided by 7 = 10.4285714286
10.4285714286 rounded to the nearest tenth = 10.4
Hope this helps :D
1.40 or 1.4 would be the square root of 2
Discrete- there are only a set of values and they do not continue up