14.A company employee has to print 3145 pages, and the company's printer prints 85 pages per minute. The function f(x)=−85x+3145f(x)=−85x+3145 represents the number of unprinted pages x minutes after the printing begins.
What is the practical domain of function f?
all whole numbers from 0 to 37
all real numbers from 0 to 37
all real numbers from 0 to 3145
all multiples of 85 between 0 and 3145

Question

22-11-2016
Mathematics

contestada

14.A company employee has to print 3145 pages, and the company's printer prints 85 pages per minute. The function f(x)=−85x+3145f(x)=−85x+3145 represents the number of unprinted pages x minutes after the printing begins.
What is the practical domain of function f?
all whole numbers from 0 to 37
all real numbers from 0 to 37
all real numbers from 0 to 3145
all multiples of 85 between 0 and 3145

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texaschic101 texaschic101 · Answer 1 · 2016-11-22T15:46:15+01:00

f(x) = -85x + 3145...the domain is going to be the x value while the range is the f(x) value.

answer is going to be all whole numbers from 0 to 37

notice if u sub in 37 for x.....
f(37) = -85(37) + 3145
f(37) = - 3145 + 3145
f(37) = 0...that means after 37 minutes, there are no un-printed pages...all the pages have been printed. So ur answer would be greater then 0, but less then or equal to 37.....and they have to be whole numbers.....they cant be all real number because that includes irrational numbers.