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Mashcka [7]
3 years ago
9

What is the area of a circle if the diameter is 16 millimetres

Mathematics
1 answer:
stiv31 [10]3 years ago
7 0

Answer:

201.1 mm²

Step-by-step explanation:

given that the diameter is 16mm,

radius = diameter ÷ 2 = 16÷2 = 8 mm

area of a circle is given by

A = πr², where

π=3.142

r = radius = 8 mm

Substituting these into the equation,

A = πr²

= 3.142 (8)²

= 201.088 mm²

= 201.1 mm² (rounded to nearest tenth)

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Find a polynomial, which, when added to the polynomial 5x^2–3x–9, is equivalent to:
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alexira [117]

Answer:

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Step-by-step explanation:

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V=\pi r^{2}*h

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We can us partial derivatives to find the differential of this volume. So we will have:

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dr is a differential of the radius, so in our case it is 0.1 cm and dh, differential of the high, is 0.1*2 cm. We multiply by 2 because we need to consider the top and the bottom of the cylinder.

Now we just need to put all of this definitions in the equation (1).

dV=4523.9*0.1+452.4*0.2=542.9 cm^{3}    

I hope it helps you!

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4 years ago
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yanalaym [24]
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