Mr. Jacobs completed a bike race. The length of the race was 11 1/4 , and Mr. Jacobs averages 7 1/2 miles each hour. How long did it take Mr. Jacobs to finish the race?

(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

pi x^2

step-by-step explanation:

pi times x squared