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3 years ago

What is the volume of a sphere with a diameter of 4.8 cm, rounded to the nearest

Mathematics

1 answer:

Ivanshal [37]3 years ago

8 0

Answer:

V≈57.91cm³

Step-by-step explanation:

Think about this answer

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The diagram shows a sector of a circle radius 10cm. Find the perimeter of the sector, giving your answer correct to 1 decimal pl

qwelly [4]

<h2>Explanation:</h2><h2></h2>

Hello! Remember you have to write complete questions in order to get good and exact answers. Anyway, I'll help you either way. A sector is a region of a circle between two radii. Let's assume the sector as:

$s=25\pi cm^2$

Then, we can find the central angle by the following equation:

$s=\frac{\theta}{360}\times\pi r^{2} \\ \\ r=10cm \\ \\ s=25\pi cm^2 \\ \\ \\ So: \\ \\ \frac{25\pi(360)}{10^2\pi}=\theta \\ \\ \theta = 90^{\circ}$

But:

$90^{\circ}=\frac{\pi}{2}$

Then:

$C:Perimeter \ of \ sector \\ \\ \\ C=\theta r \\ \\ C=\frac{\pi}{2}(10) \\ \\ C=5\pi cm \approx \boxed{15.7cm}$

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Answer:

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Step-by-step explanation:

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GREYUIT [131]

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3 years ago

Which of the following expressions is equivalent to a perfect square?

Liula [17]

Answer:

Step-by-step explanation:

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