Abox contains only black and white chips there are 8 black chips and 6 white chips how many white chips must be removed so that the possibility if random picking a black chip becomes 2/3?

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

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

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way