The average fleet-wide performance of light duty trucks has made constant improvement since 1980. For example, the time for the
average 1080 light-duty truck to accelerate from 0 to 60 mph was about 14.5 seconds. For 2005 models, that time was only 10.5 seconds.
A) Let m be the model year of a light-duty truck and T be the time in seconds for it to accelerate from 0 to 60 mph. Write a linear function T(m) to model the situation.
B) Use your answer to part (A) to predict the time it will take the average light-duty truck to accelerate from 0 to 60 mph in 2015, if the trend continues.
A) Let m be the model year of a light-duty truck and T be the time in seconds for it to accelerate from 0 to 60 mph. Write a linear function T(m) to model the situation.
B) Use your answer to part (A) to predict the time it will take the average light-duty truck to accelerate from 0 to 60 mph in 2015, if the trend continues.
1 answer:
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we know that Bob can do the whole job in 14 hours, how much of the work has he done in 1 hour only? well since he can do the whole lot in 14 hours in 1 hour he has only done 1/14 th of the job.
we know that James can do it in 18 hours, a bit slower, so in 1 hour he has done only 1/18 th of the job.
let's say it takes both of them working together say "t" hours, so in 1 hour Bob has done (1/14) of the work whilst James has done (1/18) of the work, the whole work being t/t or 1 whole, so for just one hour that'd 1/t done by both Bob and James.