Posted by admin on Saturday, August 15, 2009 · Leave a Comment
1. Henri challenges his older brother Emile to a walking race. Emile walks 2.5 meters per second, and Henri walks 1 meter per second. Emile gives Henri a 45-meter head start. What distance will allow Henri to win in a close race?
2. You can estimate the temperature outside by counting cricket chirps. Suppose a cricket chirps n times in one minute. The temperature T in degrees Fahrenheit can be computed with the formula T= 1/4n + 40. What is the temperature if a cricket chirps 150 times in a minute?
I would really appreciate it if you were to tell me how you came up with the answer, so that i could figure out my next homework. thanks alot!
1. let x + meters per second. Then determin Emile's distance at speed vs. Henri's, adding in the head start for Henri.
x<30. Any distance less than 30 allows Henri to win. 30 Meters is a tie, over than Emile wins.
2. T=150/4+40
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