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3 years ago

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Mathematics

2 answers:

Amiraneli [1.4K]3 years ago

6 0

Answer: c = 20h − 15

Step-by-step explanation:

The cost should be the total and the text says $20 per hour. Next is the $15 coupon which would take off the amount of $20 per hour. Also such, the answer is c = 20h − 15

Zina [86]3 years ago

4 0

Answer:

c=20h-15

Step-by-step explanation:

It is so because you are taking 15 dollars of the cost.

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$\bf \qquad \qquad \textit{Future Value of an ordinary annuity}\\
\left. \qquad \qquad \right.(\textit{payments at the end of the period})
\\\\
A=pymnt\left[ \cfrac{\left( 1+\frac{r}{n} \right)^{nt}-1}{\frac{r}{n}} \right]$

$\bf \qquad 
\begin{cases}
A=
\begin{array}{llll}
\textit{accumulated amount}\\
\end{array}\to &
\begin{array}{llll}
8000
\end{array}\\
pymnt=\textit{periodic payments}\\
r=rate\to 5\%\to \frac{5}{100}\to &0.05\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
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\end{array}\to &12\\
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\end{cases}$

$\bf 8000=pymnt\left[ \cfrac{\left( 1+\frac{0.05}{12} \right)^{12\cdot 4}-1}{\frac{0.05}{12}} \right]
\\\\\\
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