3 years ago

Please help meeeeeeeeeee

1 answer:

4 0

Desmos.com is a website that'll do the graphing for you. It saved my behind in school sooooo many times.

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Dafna11 [192]

Answer:

$A_2=128.69\ in^2$

Step-by-step explanation:

The area of a circle varies directly as the square of its radius.

$A=\pi r^2$

If r₁ = 2in, A₁ = 12.568 in₂, r₂ = 6.4 in, A₂ = ?

ATQ,

$\dfrac{A_1}{A_2}=\dfrac{r_1^2}{r_2^2}\\\\A_2=\dfrac{A_1r_2^2}{r_1^2}\\\\A_2=\dfrac{12.568 \times 6.4^2}{2^2}\\\\=128.69\ in^2$

So, the new area of the circle is $128.69\ in^2$ .

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3 years ago