Solve the Rational Inequality $\mathrm { P } = \mathrm { t } ^ { 2 } - 33 \mathrm { t } + 270$

Multiple Choice

Solve the rational inequality. Write the solution set in interval notation.
-The profit made when t units are sold, t > 0, is given by $\mathrm { P } = \mathrm { t } ^ { 2 } - 33 \mathrm { t } + 270$ Determine the number of units to be sold in order for P < 0 (a loss is taken) .

A) t > 0
B) t < 15 or t > 18
C) t = 15 or t = 18
D) 15 < t < 18