**Need calculus (volume) problems checked!?**

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*I’m not sure if any of these answers are right:
1)Volume of a solid formed by the boundaries: y=x^3 y=0 x=1 around the x-axis
answer: pi/7
2)Volume of a solid formed by the boundaries: y= -x+1 y=0 x=0 around the x-axis
answer: pi/3
3)Volume of a solid formed by the boundaries: y= x^(2/3) y=1 x=0 around the y-axis
answer: 3pi/7
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1 and 2 OK

3. Should be 4pi/7.

You have found volume below the curve. Question asks for volume above curve and under y = 1.

**7.2a1 Volume Disk Method – Calculus**