Question 23 (1 point) $\checkmark$ Saved
Sphere H has a diameter of $9 \mathrm{~cm}$. What si the surface area of Sphere H?

Answer

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Answer

So, the final answer is $\boxed{254.47 \, \text{cm}^2}$.

Steps

Step 1 ：Given that the diameter of Sphere H is 9 cm, we can calculate the radius as half of the diameter. So, the radius is $\frac{9}{2} = 4.5$ cm.

Step 2 ：The formula for the surface area of a sphere is $4\pi r^2$. Substituting the value of the radius into the formula, we get $4\pi (4.5)^2$.

Step 3 ：Calculating the above expression, we find that the surface area of Sphere H is approximately 254.47 cm^2.

Step 4 ：So, the final answer is $\boxed{254.47 \, \text{cm}^2}$.