type the correct answer in the box. use numerals instead of words. a circular pool has a diameter of 30…

type the correct answer in the box. use numerals instead of words. a circular pool has a diameter of 30 feet. a section of the top railing with a central angle of 27° is broken and needs to be replaced. what approximate length of railing needs to be replaced? round your answer to one decimal place. about feet of railing needs to be replaced.

type the correct answer in the box. use numerals instead of words. a circular pool has a diameter of 30 feet. a section of the top railing with a central angle of 27° is broken and needs to be replaced. what approximate length of railing needs to be replaced? round your answer to one decimal place. about feet of railing needs to be replaced.

Answer

Explanation:

Step1: Find the radius

The diameter $d = 30$ feet, so the radius $r=\frac{d}{2}=\frac{30}{2}=15$ feet.

Step2: Use the arc - length formula

The formula for the length of an arc $s$ of a circle with radius $r$ and central angle $\theta$ (in radians) is $s = r\theta$. First, convert the angle from degrees to radians. We know that $\theta=27^{\circ}$, and to convert to radians, use the conversion factor $\theta_{rad}=\theta_{deg}\times\frac{\pi}{180}$. So $\theta = 27\times\frac{\pi}{180}=\frac{3\pi}{20}$ radians. Then, substitute $r = 15$ and $\theta=\frac{3\pi}{20}$ into the arc - length formula: $s=15\times\frac{3\pi}{20}=\frac{9\pi}{4}\approx\frac{9\times 3.14}{4}=\frac{28.26}{4}=7.065$.

Step3: Round the answer

Rounding $7.065$ to one decimal place gives $7.1$.

Answer:

$7.1$