900=(1/2)*b*10*15
1800=150b
b=12
I hope you can figure out FC with this info.
Answer:

Step By Step Explanation:
Remove Parenthesis: (a) = a

Multiply: 

Apply Exponent Rule 

Apply Exponent Rule: 

Answer:
unshaded area is 8 times bigger than shaded region
area of semi circle =2πcm²
area of circle =16πcm²
now,
let the shaded region be x times bigger
again
16πcm²=2πcm²*x
x=16πcm²/2πcm²
x=8
Step-by-step explanation:
54 degrees !!!!!! will be the answer
Triangles equal 180°. The bottom left corner is 90° in this triangle. Add the angles together set equal to 180°.
x= unknown angle
90° + 67° + x= 180°
157 + x= 180
subtract 157 from both sides
x= 23°
ANSWER: x=23°
Hope this helps! :)