Answer:
the answer should be 7a^3-4a^2-2a-87
Formula: V = PI x r^2 x H
Volume = 3.14 x 4^2 x 10
Volume = 3.14 x 16 x 10
Volume = 3.14 x 160
Volume = 160π or 502.4 units^3
c
Step-by-step explanation:
combine like terms
3x^3-8x^3=-5x^3
+2x^2
-5x+3x=-2x
-5x^3+2x^2-2x
add like terms
2a - 3b + 5b - a
= (2a - a) + (-3b + 5b)
= a + 2b
Answer: D) a + 2b
