Over 18.5 days, a pool's water level changed by an average of −0.43 centimeter each day. What was the total change in the water level? Enter your answer as a decimal in the box.

Thanh and her crew are building a stage in the shape of a trapezoid for an upcoming festival. the lengths of the parallel sides of the trapezoid are 14 ft and 24 ft. the height of the trapezoid is 12 ft.what is the area of the stage? enter your answer in the box. ft²