Acertain forest covers an area of 4200 km2 . suppose that each year this area decreases by 8.5% . what will the area be after 15 years? use the calculator provided and round your answer to the nearest square kilometer.

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters