2. Beth, Kelly, Andrea, and Amy are all training for the local marathon.
a. Beth can run 6.5 miles per hour. At this rate, how far will
she run in the first 3 hours of the marathon?

19.5

Step-by-step explanation:

we will multiply the distance 6.5 miles per hour by 3 hours .. thenanswer is 19.5 miles

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

10

step-by-step explanation: