Volume of Spheres

$$V = \frac{4}{3}\pi r^3$$ where V is the volume and r is the radius.

First, find the radius by dividing the diameter by 2. Then use the formula $$V = \frac{4}{3}\pi r^3$$ .

Pi (π) is approximately 3.14.

$$V = \frac{4}{3}\pi (5)^3 = \frac{4}{3}\pi (125) \approx 523.6 \text{ cm}^3$$ .

$$V = \frac{4}{3}\pi (10)^3 = \frac{4}{3}\pi (1000) \approx 4188.8 \text{ m}^3$$ .

Look at the digit in the hundredths place. If it's 5 or more, round up the tenths place.

First, find the radius: 14 cm / 2 = 7 cm. Then, $$V = \frac{4}{3}\pi (7)^3 \approx 1436 \text{ cm}^3$$ .

$$V = \frac{4}{3}\pi (3)^3 = \frac{4}{3}\pi (27) \approx 113.1 \text{ in}^3$$ .

Using the formula, solve for r: $$r = \sqrt[3]{\frac{3V}{4\pi}}$$ .

The radius is half of the diameter: $$r = \frac{d}{2}$$ .