A certain research group plans to create computer models of x% of a list of 10,000 bacterial species known to inhabit the human body. After a budget cut, the group finds it must reduce this selection by (x − 9)%. In terms of x, how many species of bacteria will the group be able to model?
Answers.
A) x*x – 5x  B) (x)(105 – x)  C) (100)(105 – x)  D) (x)*(109 - x)  E) (x-5)/100
Initial: (x/100)*10000 = 100x (bacterial species)   After reduce BY (x - 9)%, the percentage of bacterial species = 1 - (x - 9)% = 1 - (x - 9)/100 = (109 - x)/100   Note: (x)*(109 - x)ifference between reduce to[means: the remain] and reduce by[means: the remain = 1 -reduce by]   So, the number of bacterial species after reducing: 100x*(109 - x)/100 = (x)*(109 - x)   Ans is (x)*(109 - x).
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A certain research group plans to create computer models of x% of a list of 10,000 bacterial species known to inhabit the human body. After a budget cut, the group finds it must reduce this selection by (x − 9)%. In terms of x, how many species of bacteria will the group be able to model?