1440 tons of grain were brought to a silo over two days. on the second day, 80% of the amount of the grain delivered during the first day was brought in. how many tons of grain were delivered to the silo on the first day?

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