Digits, Grade 8, Volume 1, Homework Helper

### 5-5: TEKS Practice

• 1. A solid plastic ball is a sphere with radius 8 in. How much plastic does it take to make one ball? Use 3.14 for π. Round to the nearest hundredth as needed.

• 2. Find the volume of the sphere to the nearest cubic foot. Use 3.14 for π. • 3. Find the volume of the figure. Use 3.14 as the value of π. Round to the nearest whole number. • 4. A spherical boulder is 20 ft in diameter and weighs almost 8 tons. Find the volume. Use 3.14 for π. Round to the nearest whole number as needed.

• 5. A sphere has a diameter of 0.968 inches.

• a. What is the volume of the sphere? Round to the nearest hundredth as needed.

• b. How does the volume of this sphere compare to the volume of a sphere with radius 0.968 inches? Use 3.14 for π.

• 6. The volume of a rubber ball is 5 comma 461 , and 1 third , pi , cm cubed . What is the radius of the ball?

• 7. The volume of a sphere is 7,234.56 cm3. To the nearest centimeter, what is the radius of the sphere? Use 3.14 for π.

• 8. The volume of a soap bubble is 1,375.4 mm3. Find the radius and diameter of the soap bubble. Use 3.14 for π. Round to the nearest whole whole number as needed.

• 9. Think About the Process A bowl is in the shape of a hemisphere (half a sphere) with a diameter of 5 in. • a. How can you find the radius if you know the diameter of the sphere?

• A. d = 2πr

• B. d = 2r

• C. r = 2d

• D. r = πd

• b. Find the volume of the bowl. Use 3.14 for π and round to the nearest whole number as needed.

• 10. • a. Writing What is the volume of the sphere? Use 3.14 for π. Round to the nearest hundredth as needed.

• b. Describe how the volume of the sphere changes if the radius is increased by 1.

• 11.

• a. Reasoning The volume of a sphere is 356.64 in.3. To the nearest tenth, what is the radius of the sphere? Use 3.14 for π.

• b. How can you check that your answer is correct? Explain.

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