Question

At the 1998 Winter X-Games held in Crested Butte, Colorado, Jennie Waara, from Sweden, won the women’s snowboarding slope-style competition. Suppose that in one of the qualifying races, Ms. Waara traveled 5 feet in the first second, and the distance she traveled increased by 7 feet each subsequent second. If Ms. Waara reached the finish line in 15 seconds, how far did she travel?

A. 646 feet
B. 790 feet
C. 766 feet
D. 810 feet

Answer 1

The answer is D) 810 ft.

Answer 2

Hello!

We can represent this using the equation 7x + 5

We find what the values are from 0 to 14 and add them

5 + 12 + 19 + 26 + 33 + 40 + 47+ 54 + 61 + 68 + 75 + 82 + 89 + 96 + 103 = 810

The answer is 810 feet

Hope this helps!