En una encuesta realizada a 10 estudiantes para la ficha psicopedagógica sobre la edad actual, se obtienen los siguientes resultados en años: 30, 29, 28, 55, 45, 36, 3: 70. 19. 20. Con esta información determinar la edad promedio. a. 30 O 0.37 c. 20 O d. 45​

Can someone me out here number 4 plz

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

How do i take any fraction and make it into a decimal or percentage?