55 percent of 120 is 66.

120 - 54 = 66.

66 Books are fictional

So that being said, the other part of your remaining total is 54. 54 books are non-fictional. (The above where I said 120-54). Since 120 - 66 = 54.

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3 years ago

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A circles has radius 10 centimeters. Suppose an arc on the circle has length 8<img src="https://tex.z-dn.net/?f=%5Cpi" id="TexFo

goldfiish [28.3K]

Answer:

The measure of the central angle whose radii define the arc is $\mathbf{\frac{4\pi }{5} }$

Step-by-step explanation:

Radius of circle = 10 cm

Length of arc = $8\pi$

We need to find Theta $\theta$

The formula used will be: $S=r \theta$

S= length of arc, r = radius and $\theta$ = angle

Putting values and finding \theta

$S=r \theta\\8\pi =10 \theta\\\theta=\frac{8\pi }{10} \\\theta=\frac{4\pi }{5}$

So, the measure of the central angle whose radii define the arc is $\mathbf{\frac{4\pi }{5} }$

4 0

3 years ago