The region bounded by the curves y=(1/x), y=x^2, and x = 0.1 is revolved around the y-axis to form a solid. What is the approximate volume of the solid?
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Answer:
C
Step-by-step explanation:
1/x = x²
x³ = 1
x = 1
y = 1
x = 0.1
1/0.1 = 10
0.1² = 0.01
V1: x² = y
Integrate: y²/2
Limits y = 0.01 to y = 1
½(1² - 0.01²) = 0.49995 pi
V2: x² = 1/y² = y^-2
Integrate: -1/y
Limits y = 1 to y = 10
(-1/10) - (-1/1)
0.9pi
V1 + V2 - [pi × 0.1² × (10-0.01)]
0.49995pi + 0.9pi - 0.0999pi
= 1.30005 pi units³
= 4.084227529 units³