Solve the Problem $t$ Units Are Sold $t > 0$ , Is Given By

question 29

Multiple Choice

Solve the problem.
-The profit made when $t$ units are sold, $t > 0$ , is given by $P = t ^ { 2 } - 30 t + 209$ . Determine the number of units to be sold in order for $P = 0$ (the break- even point) .

• A) \(t > 11\)
• B) \(t = - 11\) or \(t = - 19\)
• C) \(t = 30\)
• D) \(t = 11\) or \(t = 19\)