Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally distributed, with a mean life of 1900 hr and a standard deviation of 100 hr. if 40 comma 000 of these bulbs are produced, how many can be expected to last at least 1900 hr?

b

step-by-step explanation:

if a was wrong then it has to be b it cant be c either because not all the y intercepts are the same!

ok now , i would like brainlest plz

i = 2 / - 5

step-by-step explanation:

evaluation of ( 2 - 4 ) ( p + q ) when p = 2 and q = 5 i, by putting values of p and q,                                                                    

a

step-by-step explanation:

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