Question 58895
[RL-26.75]<2.17
During an exam, the rate satisfied
[Re-38.75]<2.17 
a. find the range of values for Re and RL.
[RL-26.75]<2.17
-2.17<RL-26.75<2.17
24.58<RL<28.92
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[Re-38.75]<2.17 
-2.17+38.75<Re<2.17+38.75
36.58<Re<40.92
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b. The class had 35 students. Define TL and Te to represent the total amounts of carbond dioxide in grams emitted during a one hour lecture and a one hour exam. Write inequalities involving absolute value which represent the ranges for Tl and Te.
24.58<RL<28.92
Multiply thru by 35 to get:
860.3<TL<1012.2
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36.58<Re<40.92
Multiply thru by 35 to get:
1280.3<Te<1434.3
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Cheers,
Stan H.