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

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)