How many feet should be cut off to make a plank 5 7/8 feet long

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

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

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca