A certain pollutant is being removed from a small lake. Let the T be the number of days from the beginning of the removal process and f(t)=50(1-T/120) be the number of parts per million of this pollutant in the water. Find the domain of the function and sketch its graph throughout the domain. PLEASE PLEASE I NEED HELP WITH THIS QUESTION!
2007-01-20 08:12:08 · 2 answers · asked by hookeduprides 2 in Education & Reference ➔ Homework Help
Multiply it out to get f(t) = 50 - (5/12)*t. Since the concentration of the pollutant can't go above 50 or below zero, the domain is the range of t for which 50≥f(t)≥0. You should recognize the equation as that of a straight line; the slope is the coefficient of t and it crosses the y axis at 50.
2007-01-20 10:03:01 · answer #1 · answered by gp4rts 7 · 0⤊ 1⤋
The domain of the given function is all real numbers, since the only fraction doesn't have a variable in the denominator. That means that every single number you plug in to "t" makes the equation equal a number. I don't have my graphing calculator, of else I would graph it. My guess is it's going to be linear, since there's no powers.
2007-01-20 08:49:31 · answer #2 · answered by zoralink3 3 · 0⤊ 0⤋