[SOLVED] high school calc problem 1. The problem statement, all variables and given/known data If an object moves along the y axis (marked in feet) so that its position at time x (in seconds) is given by the indicated function; y= (x^3)-(9x^2)+15x; Find when v=0 2. Relevant equations v=y prime, and i already have found y prime to be (3x^2)-(18x)+15 3. The attempt at a solution I checked the selected answers in the back of the book and did a little plug and chug and called it a day..... haha. I'm assuming theres a more relevant process so any help is mucho appreciated. thanks.