Step 1 is the same for both ⓐ and ⓑ , so we will show it just once.
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| Step 1. Read the problem. Draw the figure and label it with the given information. |
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| ⓐ |
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| Step 2. Identify what you are looking for. |
the volume of the sphere |
| Step 3. Name. Choose a variable to represent it. |
let V = volume |
| Step 4. Translate. Write the appropriate formula. |
V=34πr3 |
| Step 5. Solve. |
V≈34(3.14)63 V≈904.32cubic inches |
| Step 6. Check: Double-check your math on a calculator. |
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| Step 7. Answer the question. |
The volume is approximately 904.32 cubic inches. |
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| ⓑ |
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| Step 2. Identify what you are looking for. |
the surface area of the sphere |
| Step 3. Name. Choose a variable to represent it. |
let S = surface area |
| Step 4. Translate. Write the appropriate formula. |
S=4πr2 |
| Step 5. Solve. |
S≈4(3.14)62 S≈452.16 |
| Step 6. Check: Double-check your math on a calculator |
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| Step 7. Answer the question. |
The surface area is approximately 452.16 square inches. |