If a circle has a circumference of 6.28 inches, then what is the radius?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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

Find all the angles that satisfy the equation cos(θ)=32