If 8 g of a radioactive substance are present initially and 8 yr later only 4.0 g remain, how much of the substance, to the nearest tenth of a gram, will be present after 11 yr?

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

What is the value for this expression? 2e-5

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.