Answer:
7. D. 130² ft.
8. She can feed 6 friends.
9. There are 7 trees in each row.
10. B. 490.
11/7 just flip the numerator and the denominator
Answer:
The solution is 
Step-by-step explanation:
The equation

can be rewritten as

and can be further simplified to
.
Now, taking the inverse sine of both sides we get:


The value of the right side on the interval
is
,
which makes the equation (2)

solving for
gives

which is our solution.