A store offers a discount of 30 percent on all reference books if a dictionary cost 12$ before the discount what is the dollar amount?
To calculate the dollar amount after the discount, you need to subtract the discount percentage from 100% to get the actual cost percentage. Then you can calculate the dollar amount by multiplying the original price by the actual cost percentage.
In this scenario, the discount is 30%, so the actual cost percentage is 100% - 30% = 70%.
To find the dollar amount after the discount, you multiply the original price of $12 by the actual cost percentage of 70%:
$12 * 0.70 = $8.40
Therefore, the dollar amount of the dictionary after the 30% discount is $8.40.