To calculate the volume of a sphere, you can use the formula:
\[ V = \frac{4}{3} \pi r^3 \]
where \( V \) is the volume and \( r \) is the radius of the sphere.
First, we need to find the radius from the diameter. The diameter of the sphere is 7 inches, so the radius \( r \) is:
\[ r = \frac{\text{diameter}}{2} = \frac{7}{2} = 3.5 \text{ inches} \]
Now we can substitute \( r = 3.5 \) into the volume formula. Using \( \pi = 3.14 \):
\[ V = \frac{4}{3} \times 3.14 \times (3.5)^3 \]
First, we calculate \( (3.5)^3 \):
\[ (3.5)^3 = 3.5 \times 3.5 \times 3.5 = 42.875 \]
Now, substitute this back into the volume formula:
\[ V = \frac{4}{3} \times 3.14 \times 42.875 \]
Calculating \( 3.14 \times 42.875 \):
\[ 3.14 \times 42.875 \approx 134.88475 \]
Now multiply by \( \frac{4}{3} \):
\[ V = \frac{4}{3} \times 134.88475 \approx 179.84633 \]
Finally, round this to the nearest tenth:
\[ V \approx 179.8 \text{ inches}^3 \]
So, the volume of the sphere is approximately \( \boxed{179.8} \) inches³.
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