9x2-1............................................................................
The answer is 1/25 because the time is each hour which goes on top and how much it changes goes every 25 miles per hour
Normally, two packs of batteries cost $1.89*2=$3.78. The discounted price of $3.40 divided by the standard price of $3.78 for two packs is approximately .9, or 90 percent. Therefore, we have an approximately ten percent discount with the sale.
