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vitfil [10]
3 years ago
14

The radius of a circle is doubled. How does the area change?

Mathematics
1 answer:
ra1l [238]3 years ago
8 0

Answer:

Area increases by a factor of 4

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr²

If the radius is doubled, that is r = 2r, then

A = π(2r)² = 4πr²

Hence the area has been increased by a factor of 4

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Answer:

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<u><em>Domain:</em></u>

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<u><em>Interval notation:</em></u><em>  </em>(-∞,∞)

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<em><u>Set-Builder Notation:</u></em> {x | x ∈ R }

<em><u>Range:</u></em>

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:Done

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