4 Select the correct answer. Simplify the expression. 3.1 36481478 O A 18.3272 32xy2 OB. 1892y2 33 xy2 OC. 185y2 33x2y2 OD. 9x2y 2002​

Anew obstacle course is home to several new types of challenging obstacles. one such obstacle is traversing a 15-stair staircase. to make it more challenging, the stairs are not uniformly spaced. rather, the vertical space between consecutive stairs for the first 10 stairs is 113 feet and the vertical space for the last 5 stairs is 134 feet. what is the total vertical distance traveled ascending and descending the entire 15-stair staircase?