Assignment:
How do you solve the inequality (x + 1)(x - 6) < 0, and express the solution using interval notation.
If an object is shot upward with an initial velocity of 240 feet per second so that its height s (in feet) above the ground after t seconds is given by s = -16t2 + 240t. For what values of t will the object be at least 416 feet above the ground?
Provide complete and step by step solution for the question and show calculations and use formulas.