Answer:
you did it right D is right answer
9/2 is already a fraction, and the reciprocal of 2/3 and 3/2
Answer:
20 units
Step-by-step explanation:
Volume of a cylinder = πr²h
V = πr²h
height, h = 7
V = π * r² * 7
V = 8792
8792 = 21.991148 * r²
r² = 8792 / 21.991148
r² = 399.79722
r = √399.79722
r = 19.99unit
r = 20 units
Finding the parabolas roots.
-x^2+4x=0
-x(x-4)=0
x=0 and x=4
(top is 4 and bottom is 0)
-64/3+32=32/3
The area above the x axis is 32/3