You have an above ground pool that is 20 feet in diameter. one bag of sand does three square feet. how many bags of sand do you need?

   Number of sand bags are 105

Step-by-step explanation:

Alright, lets get started.

The diameter of pool is given as :

The radius of pool will be :

So the area of the pool will be:

Area =

Area =

Area =

Area =

3 square feet is covered by 1 sand bag, so

314.16 square feet will be covered by :

So, no of sand bag =

Rounding off to nearest number

Number of sand bags are 105  :   Answer

Hope it will help :)

(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

add 5 subtract 1

step-by-step explanation: