To write 10-7 in standard form, you would write a decimal number with: 1s in the first 7 decimal places. 1s in the first 6 decimal places and 0 in the 7th decimal place. 0s in the first 6 decimal places and 1 in the 7th decimal place. 0s in the first 7 decimal places and 1 in the 8th decimal place.

(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

c) yes, because of asa or aas