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user100 [1]
3 years ago
10

Calculate the area of a circle with a radius of 2 cm and a circle with a radius of 4 cm. Leave your answers in terms of pi.

Mathematics
1 answer:
galina1969 [7]3 years ago
6 0
S = πr^<span>2
</span>so area of circle where r is 2cm;π=3,14 will be 
S = π*(2^2)
S=π*4
S=4π  cm2

S = πr^2
so circle  where r is 4cm;π=3,14 will be 
S = π*(4^2)
S=π*16
S=16π  cm2


the answer for second question is thet the area gets bigger 4 times if we double radius)so "yes"

ANSWER IS 
<span>C) 4π cm2; 16π cm2; YES </span>
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ANSWER: 32 five-dollar bills

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EXPLANATION:

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\begin{aligned} x + 2y &= 44 && \text{(II)} \\ x + 2(38 - x) &= 44\\ x + 76 - 2x &= 44 \\ -x &= -32 \\ x &= 32 \end{aligned}

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