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.

    A sphere with radius 3 ft.

  • 3. Find the volume of the figure. Use 3.14 as the value of π. Round to the nearest whole number.

    A sphere with diameter 8 inches.

  • 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 sphere with radius 22 inches.

    • 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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Table of Contents

Digits, Grade 8, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Proportionality Unit C: Expressions, Equations, and Relationships English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties