A rocket is launched at t=0t=0 seconds. Its height, in meters above sea level, as a function of time is given by h(t)= −4.9t^2+ 247t +395

Question

1. A rocket is launched at t=0t=0 seconds. Its height, in meters above sea level, as a function of time is given by h(t)= −4.9t^2+ 247t +395

What is the independent variable and its units?  

What is the dependent variable and its units? 

2.The profit (in dollars) for a certain commodity, n, where is in units, is given by the function

P(n)=− 25n^2+ 400n+ 900

What is the independent variable and its units?  

What is the dependent variable and its units? 

Answer 1

independent variable is time in seconds

dependent variable is height in meters

for the 2nd problem

independent variable is the number or quantity of the commodity sold, units are integers, a unit-less number, but not a fraction.

dependent variable is profits measured in dollar units.