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Aleksandr-060686 [28]
2 years ago
11

What is the cirumference of a circle with a diameter of 4.1 cm

Mathematics
1 answer:
nordsb [41]2 years ago
5 0

<em>Answer:</em>

<em>C = 12.88</em>

<em>Step-by-step explanation:</em>

<em>If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by </em><em>π</em><em> to get the diameter.</em>

<em>C = π d = π · 4.1 = </em><em>12.88</em><em>053cm </em>

Glad to help ya!!

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We know that the volume of a sphere of radius r is given by

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4,188.79=\frac{4}{3}\pi r^3\\&#10;\\&#10;4\pi r^3=4,188.79 \times 3\\&#10;\\&#10;r^3=\frac{4188.79 \times 3}{4\pi}\\&#10;\\&#10;r^3=1000\\&#10;\\&#10;r=10

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Therefore, the increase in the surface area is given by

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Hence, the average rate at which the surface area is changing is given by

\frac{1570}{12}=130.8

Therefore, the average rate at which the surface area is changing is given by 130.8 square centimeters per second.

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