Between 2008 and 2012, the number of computer science teachers decreased despite a jump in computer science majors from 400 in 2008.
In the given expressions, T and S represent the percent change in the number of teachers and computer science students, respectively, over the four years and R represents the the number of computer science students per teacher in 2008.
Percent change in a quantity X is calculated using the formula
(Xrecent−XoldXold) * 100.
Select the expression that represents the number of teachers in 2012 and select the expression that represents the number of computer science students per teacher in 2012.
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发表于 2014-9-26 04:23:52
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