How much water must be evaporated from 12 ounces of 1% salt solution to make 3% salt solution?

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

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?