Aregular hexagon rotates counterclockwise around its center. it turns through angles greater than 0° and less or equal to 360°. at how many different angles of a hexagon map onto itself?

12 is 33 1/3% of 36 what is the whole

Twelve less than a number is at most 20

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