The estimated total cost, y, Of a child’s toy is practically based on the number of batteries used, x, Cost of one battery is $.75. Toy itself cost $12. Which equation represents the situation?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?