Angle RSU is complementary to angle UST. Angle QSR is congruent to angle RSU. Lines Q, R, U, and T extend from point S from left to right. Angle R S T is a right angle. Which statement is true about angles UST and QSR? They are complementary. They are supplementary. They are congruent. They are obtuse.

The mountain springs water company has two departments, purifying and bottling. the bottling department received 67,000 liters from the purifying department. during the period, the bottling department completed 65,000 liters, including 3,000 liters of work in process at the beginning of the period. the ending work in process was 5,000 liters. how many liters were started and completed during the period?