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Genrish500 [490]
4 years ago
13

Two mechanics worked on a car. The first mechanic charged $85 per hour, and the second mechanic charged $80 per hour. The mechan

ic worked for a combined total of 25 hours, and together they charged a total of $2100. How long each mechanic work ?
Mathematics
1 answer:
igor_vitrenko [27]4 years ago
4 0

Answer: 13 and 12

Step-by-step explanation:

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A new truck that sells for 29,000 depreciates 12% each year. What is the decay factor b?
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\bf y=a(b)^t\qquad or\qquad A=I(1-r)^t\qquad \textit{let's check}\\\\
-------------------------------\\\\
\qquad \textit{Amount for Exponential Decay}\\\\
A=I(1 - r)^t\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
I=\textit{initial amount}\to &29000\\
r=rate\to 12\%\to \frac{12}{100}\to &0.12\\
t=\textit{elapsed time}\\
\end{cases}
\\\\\\
A=29000(1-0.12)^t\implies 
\begin{array}{llll}
A=&29000(0.88)^t\\
&\uparrow \qquad\quad  \uparrow \\
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3 years ago
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yanalaym [24]

Answer:lol

Step-by-step explanation:

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7 0
3 years ago
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A + 1/a= p find a^3 + 1/a^3<br><br><br><br>(1) p^3 + 3p<br><br>(2) 3p<br><br>(3) p^3 - 3p<br><br>​
REY [17]

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Answer:

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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