Answer: Use trigonometric ratio to solve
(88 + 94 + 89 + 85 + x) / 5 = 90
(356 + x) / 5 = 90
356 + x = 90 * 5
356 + x = 450
x = 450 - 356
x = 94 <==
Answer: 38
Explanation the answer is 38
Answer:

Step-by-step explanation:
Here we see tan(B) has opposite side of 12 and adjacent of 9
using the formula:



100/(n-1)=4
100=4n-4
104=4n
26=n
So there are 26 scores