Question

1 if the diameter of a sphere is 18 inches, what is its radius?
a. 18 inches
b. 27 inches
c. 36 inches
d. 9 inches

Explanation:

Step1: Recall the relationship between radius and diameter

The formula for the radius \(r\) of a sphere in terms of its diameter \(d\) is \(r=\frac{d}{2}\).

Step2: Substitute the given diameter value

Given \(d = 18\) inches. Substitute into the formula: \(r=\frac{18}{2}\).

Step3: Calculate the radius

\(\frac{18}{2}=9\) inches.

Answer:

D. 9 inches