A cone has a circular base with a diameter of 18 inches. The height of the cone is 40 inches. The slant height of the cone is 41 inches. What is the approximate LATERAL AREA of the CONE?

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