2 years ago

There are 16 girls and 20 boys what is the ratio of girls to boys

Mathematics

1 answer:

kvasek [131]2 years ago

3 0

The ratio is 4:5 girls to boys

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Step-by-step explanation:

The area of a sector with radius r and central angle $\theta$ (In radian) is given by :-

$A=\dfrac{1}{2}r^2\theta$

Given : A sector of a circle has area $25 cm^2$ and central angle 0.5 radians.

Let r be the radius , then we have

$25=\dfrac{1}{2}r^2(0.5)\\\\\Rightarrow\ r^2=\dfrac{2\times25}{0.5}\\\\\Rightarrow\ r^2=\dfrac{50}{0.5}=100\\\\\Rightarrow\ r=\sqrt{100}=10\ cm$

Thus, radius = 10 cm

The length of arc is given by :-

$l=r\theta=10\times0.5=5\ cm$

Hence, the length of the arc = 5 cm

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How many solutions does the system have?<br> y = -7x + 8<br><br> y = -7x - 8<br> Choose 1 answer:

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Step-by-step explanation:

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