PLZZ I NEED HELP ASAP ILL GIVE BRAINIST TO THE First to ANSWER

Mathematics

1 answer:

Olin [163]3 years ago

8 0

Answer:

Aurora used 4 gigabytes.

Explanation:

Knowing that her total bill for September is $113, we can subtract $65 since that is the phone service. We are left with $48, which is the total amount paid for gigabytes. We can divide that by 4 to get $12, and since each gigabyte is worth $12, it means that Aurora used 4 gigabytes.

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PolarNik [594]

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the hoop rotates through qan angle of 3/2 pie radian in 1 second how many revolutions does the hoop make in 1 minute

timofeeve [1]

A revolution is a full go-around the circle, namely a 2π angle, as opposed to pie, but yours sounds more delicious.

so, we know it does 3/2 π in 1 second, how many π does it do in 60 seconds(1 minute) ?

$\bf \begin{array}{ccll}
radians&seconds\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
\frac{3\pi }{2}&1\\\\
r&60
\end{array}\implies \cfrac{\frac{3\pi }{2}}{r}=\cfrac{1}{60}\implies \cfrac{\frac{3\pi }{2}}{\frac{r}{1}}=\cfrac{1}{60}$

$\bf \cfrac{3\pi }{2}\cdot \cfrac{1}{r}=\cfrac{1}{60}\implies \cfrac{3\pi }{2r}=\cfrac{1}{60}\implies \cfrac{3\pi \cdot 60}{2}=r\implies 90\pi =r\\\\
-------------------------------\\\\
\textit{how many times }2\pi \textit{ goes into }90\pi ?\qquad \cfrac{90\pi }{2\pi }\implies 45$

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