Solve the Rational Inequality $P = t ^ { 2 } - 30 t + 200$

question 85

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 $P = t ^ { 2 } - 30 t + 200$ Determine the number of units to be sold in order for P = 0 (the break- even point) .

• A) t = -10 or t = -20
• B) t = 30
• C) t > 10
• D) t = 10 or t = 20