Which of these figures must be a rectangle?
O
A. A trapezoid with at least one right angle
O
B. A trapezoid with two congruent sides
O
C. A parallelogram with at least one right angle
O
D. A parallelogram with four congruent sides

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%