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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

Chapter Review

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Exercise 13 Page 456

Use the formula for the volume of a sphere.

5575.3cm^3

Practice makes perfect

The given solid is a sphere.

We will use the formula for the volume of a sphere to get the volume. V=4/3π r^3 We know that the diameter is 22 centimeters. We will divide the diameter by 2 to find the radius! r=22/2= 11 Now we can substitute this value into the formula to get the volume.

V=4/3π r^3

r= 11

V=4/3π ( 11)^3

▼

Evaluate right-hand side

Calculate power

V=4/3π (1331)

MoveRightFacToNum

a/c* b = a* b/c

V=5324/3π

Use a calculator

V=5575.279762...

Round to 1 decimal place(s)

V≈ 5575.3

The volume of the sphere is approximately 5575.3 cubic centimeters.

Subchapter links

1 Volumes of Cylinders p.455

2 Volumes of Cones p.456

3 Volumes of Spheres p.456-457

4 Surface Areas and Volumes of Similar Solids p.457