Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57 hours and a standard deviation of 3.5 hours. With this information, answer the following questions.
(a) What proportion of light bulbs will last more than 62 hours?
(b) What proportion of light bulbs will last 51 hours or less?
(c) What proportion of light bulbs will last between 58 and 62 hours?
(d) What is the probability that a randomly selected light bulb lasts less than 46 hours?

answer: two five pound bags one two pound

step-by-step explanation:

if x = 1, then the answer is 3.5

these sign is used to tell weather the number is greater or less than the number   <   or >     but this sign means its equal =    

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step-by-step explanation:

answer: the resulting cross section is a rectangle. solution: a plane parallel to the base of a triangular prism will intersect a cross section that is the same shape as its bases. so the cross section is a triangle.

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