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 1 1/3 feet and the vertical space for the last 5 stairs is 1 3/4 feet. what is the total vertical distance traveled ascending and descending the entire 15-stair staircase?

Step-by-step explanation:

Here, the vertical space between two consecutive stairs in first 10 stairs =

⇒ The total vertical distance for 10 stairs =

Also, The vertical space between two consecutive stairs for last 5 stairs =

⇒ The total vertical distance for 10 stairs =

Thus, The total vertical distance = Total vertical space for the first 10 stairs + Total vertical space for the last 5 stairs

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207/8 is the right

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft