1. The problem statement, all variables and given/known data Between 1985 and 1995 the number of computers in thousands sold in canada is estimated by c(t) = 0.92(t^3 + 8t^2 + 40t +400) In what year did home computers sale reach 1.5 million? 2. Relevant equations 3. The attempt at a solution I know I have to isolate the t to obtain time. So far this is what I have gotten up to 1230.43 = t^3 + 8^2 + 40t Here is where I am stuck. Would I have to factor out a t in order to move on to th next step?