Alarge manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1500 hours and a standard deviation of 60 hours. to minimize the number of bulbs that burn out during operating hours, all bulbs are replaced at once. how often should the bulbs be replaced so that no more than 1% burn out between replacement periods? (round your answer to one decimal place.)

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

b

step-by-step explanation:

it have 5 sides and 5 identicle angle.the rest does not have the same property as b.

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