3 lb beef roast for $8.95 or 5 lb beef roast for $14.85. (Round to the nearest cent.)

5 lb. beef roast for $14.85 = $2.97 per lb.

Step-by-step explanation:

$8.95 / 3 =$2.9833

$14.85 / 5 = $2.97

(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

b. astronomers