Use the Graph of F(x) to Solve the Inequality $t$ Units Are Sold

Multiple Choice

Use the graph of f(x) to solve the inequality.
-The profit made when $t$ units are sold, $t > 0$ , is given by $P = t ^ { 2 } - 34 t + 285$ . Determine the number of units to be sold in order for $\mathrm { P } > 0$ (a profit is made) .

A) $t = 19$ units or $t = 15$ units
B) $t > 19$ units or $t < 15$ units
C) $t = 34$ units
D) 19 units $< t < 15$ units