The lifetimes of light bulbs of a particular type are normally distributed with a mean of 210 hours 14) and a standard deviation of 5 hours. what percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean

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You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?

Julie multiplies 6.27 by 7 and claims the product is 438.9 .explain without multiplying how you know juliesanswer is not correct. find the correct answer