Assume that adults have iq scores that are normally distributed with a mean of 102 and standard deviation of 12 find the iq score that separates the bottom 25 from the top 75

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?

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers

Suppose 38 lbs of coffee beans are required to produce 2 lbs of farmer's coffee. how many lbs of coffee beans are required to produce 309 lbs of farmer's coffee?