Question

In the 1960s, the average price for an ear of corn was 4.17 cents. In the 1980s, the average price went up to 9.83 cents. How much did the average price go up?

Answer 1

it went up a total of $5.66 cents in an average of 20 years

Answer 2

5.66 cents was the average price rise in 2 decades.

Explanation:

In the 1960s, average price of an ear of corn was = 4.17 cents

In the 1980s, average price went up to 9.83 cents

Average price rise =
`\frac{\text{Change in price}}{\text{number of years}}`

Average price rise =
`(9.83-4.17)/(20)=(5.66)/(20)`

= 5.66 cents in two decades

Therefore, average price rise in 2 decades was 5.66 cents.