3 years ago

the tire on frank's bike moves 75 inches in one rotation. how many rotations will the tire have made after frank rides 50 feet

Mathematics

1 answer:

Orlov [11]3 years ago

7 0

8 rotations

50 feet = 600 inches

600 inches divided by 75 inches = 8

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The value of a motorbike depreciates by 32% per year. Work out the current value of a motorbike bought 5 years ago for £3600

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$\bf \qquad \textit{Amount for Exponential Decay}
\\\\
A=P(1 - r)^t\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{initial amount}\to &3600\\
r=rate\to 32\%\to \frac{32}{100}\to &0.32\\
t=\textit{elapsed time}\to &5\\
\end{cases}
\\\\\\
A=3600(1-0.32)^5\implies A=3600(0.68)^5\implies A\approx 523.41601$