You can use the identity

The sign is negative because the angle is in the 3rd quadrant.
This corresponds to ...
a. -(4√17)/17
The answer is 9:1. All you have to do is simplify it
First you have to know the formula, which is a=p*r^2.
next you have to fill in the info which is 3.14*16 or A=50.24
so the answer for the area is 50.24 Ft
hope this helps have a great day
pls give brainliest
Answer: 5 5/7
Step-by-step explanation:
3+2 = 5
You then look at you fractions. They both have the same denominator so we go ahead and add the two together.
3/7 + 2/7 = 5/7
Your final answer is 5 5/7