FOR STEP BY STEP AND LOTS OF POINTS 13. Bernardo originally had 55 customers on his paper route. Through a newspaper sales promotion,
his customer base increased to 70. What was the percent of increase over the original number of
customers?

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?