the annual income of a car company was $200,000 in 2017. in 2018 they registered annual income of $280,000. what was the percent of the increase?

Answer:

The percent of the increase is 40%

Step-by-step explanation:

Given:

The annual income of a car company  in 2017= $200,000

The annual income of a car company  in 2018= $280,000

To Find:

Increase in the income percentage=?

Solution:

Percent increase = 40%

(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