Answer: 45
Step-by-step explanation:
The total degrees in a circle is 360.
The perpendicular angle that you see is 90 degrees, added to angles of x and 3x, you get the total degrees.
so 90 + x + 3x = 90 + 4x = total
90 + 4x = 360
4x = 180
x = 45 degrees
The answer is c. 240π
V=πr² h/3 =π×6²× 20/3 ≈753.98224
I guess i would be <span>a=2.790220576310317 or </span><span>−<span>1.2902205763103165</span></span>
