Question 33698This question is from textbook Algebra I 2004
: The problem is from a workbook that goes with the text book listed. But I gave as much information as possible. according to the answer in the back of the workbook it should be 2 hours, but the book has been known to be wrong. Any help will be greatly appreciated. thank you in advance. Jackie
The problem is as follows:
A river dam is opened for a short period of time to lower the water level. the water level, in feet, is modeled by the function y = 22 + 3|t-2|, where t is in hours. How many hours will it take for the level to reach its lowest point?
This question is from textbook Algebra I 2004
Answer by Nate(3500)   (Show Source):
You can put this solution on YOUR website! y=22+ 3|t-2|
this is the equation to tell us the water level....
we know that absolute value of a number cannot result in negative, so the water level has to be atleast 22 feet high.... we can actually get 22 as an answer for 'y' if we produce a number for 't' in which the absolute value would result in zero:
y = 22 + 3|t - 2| original equation
y = 22 + 3|2 - 2| plug in two
y = 22 + 3|0|
y = 22
if the time is 0, then the lowest water level (22) is possible
-Attention-
are you sure you are not finding the water level of the river beneath the dam? I read the question and compared it with your book's equations.... it doesn't make sense to me.
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