1. What is the total cost for fixing a drain that takes 7 hours? 2. If the plumber charged a total of $329, how many hours did he spend fixing the drain?

(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

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times

answer is b

step-by-step explanation:

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