Math Question
![The time, \( t \) (in minutes), you need to type a certain paper varies inversely with the rate, \( r \) (in words per minute), that you can type. When typing 40 words per minute, you can finish in 50 minutes. Find the constant of proportionality and write an equation relating \( t \) and \( r \).
\[
t=\frac{[?]}{[]}
\]](https://d3hlidq5bf9vg0.cloudfront.net/stunitas/0196/7vK1MUN6E5MJlCbJKBUXoyE3Tg0KHs9BUopWUBL35adl1RbEqOkakzKHxwH3WQKE_q.jpg "The time, \( t \) (in minutes), you need to type a certain paper varies inversely with the rate, \( r \) (in words per minute), that you can type. When typing 40 words per minute, you can finish in 50 minutes. Find the constant of proportionality and write an equation relating \( t \) and \( r \).
\[
t=\frac{[?]}{[]}
\]")
Solution
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