If 8 coins stacked up = 1 centimeter how tall would a stack of 500 coins be

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola

Find the interior angle of a regular polygon which has 6 sides

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