First simplify the square roots:

Then simplify the last two terms:

Since 61 is prime, you can't take a rational root out of it.
C. 110. This is because all triangles add up to equal 180*. So you add the two angles you have and subtract from 180.
6^9 x 6^-7 = 6^2
x= -7
Hope this helps :)
Answer: A=351.68 cm²
Step-by-step explanation:
To find the area of the shaded region, we would subtract the area of the circle by the area of the inner circle.
Area of Circle



Area of inner (white) circle



Now that we have the area to the circle and inner circle, we would subtract to find the area of the shaded region.



.7431448255...
i entered sin(48) into my calculator and got the answer above