On a circle of radius 8 feet, give the degree measure of the angle that would subtend an arc of length 3 feet. Round your answer to the near

On a circle of radius r= 8 feet, give the degree measure of the angle $\alpha$ that would subtend an arc of length 3 feet. Round your answer to the nearest hundredth, or two decimal places .

$\large arc=2\pi r\cdot \frac{\alpha}{360deg}$

$\large \alpha=\frac{arc \cdot 360deg }{2\cdot \pi\cdot r}$

$\large \alpha=\frac{3ft \cdot 360deg }{2\cdot \pi\cdot 8ft}$

$\large \alpha=21.49\ deg$

$\large The \ arc \ of \ the \ length \ 3 feet \ is \ formed \ by \ an \ angle \ of \ 21.49\ deg.$

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Thanks asinus....here's another way

s  = r * theta in radians  .......where s is the arc length and r is the radius...so we have  

3  = 8 * theta

3/8  = theta  ......  convert to degrees

3/8  * 180 / pi   ≈ 21.486°