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MissTica
2 years ago
7

it cost ruby $4 dollars to send 48 messages.what was her cost of texting in texts per dollar?express your answer in simplest for

m
Mathematics
2 answers:
andrew-mc [135]2 years ago
7 0

Answer:

$0.83

Step-by-step explanation:

$4 = 48x (x = number of text messages)

$4 ÷ 48 = x (divide by 48 on both sides)

0.83 = x


navik [9.2K]2 years ago
5 0

Answer:

1/12 I’m pretty sure

Step-by-step explanation:


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faltersainse [42]
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then she turns around and grabs those 4329.73 and put them in an account getting 8% APR I assume, so is annual compounding, for 7 years.

\bf \qquad \textit{Compound Interest Earned Amount}&#10;\\\\&#10;A=P\left(1+\frac{r}{n}\right)^{nt}&#10;\quad &#10;\begin{cases}&#10;A=\textit{accumulated amount}\\&#10;P=\textit{original amount deposited}\to &\$4329.73\\&#10;r=rate\to 8\%\to \frac{8}{100}\to &0.08\\&#10;n=&#10;\begin{array}{llll}&#10;\textit{times it compounds per year}\\&#10;\textit{annually, thus once}&#10;\end{array}\to &1\\&#10;t=years\to &7&#10;\end{cases}&#10;\\\\\\&#10;A=4329.73\left(1+\frac{0.08}{1}\right)^{1\cdot 7}\implies A=4329.73(1.08)^7\\\\\\ A\approx 7420.396

add both amounts, and that's her investment for the 11 years.
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3 years ago
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