The amount of time a certain brand of light bulb lasts is normally distributed with a

mean of 2000 hours and a standard deviation of 55 hours. What percentage light bulbs last less than 2080 hours, to the nearest tenth?

92.65 % light bulbs last less than 2080 hours

Step-by-step explanation:

We are given that The amount of time a certain brand of light bulb lasts is normally distributed

Mean =

Standard deviation =

We are supposed to find  What percentage light bulbs last less than 2080 hours, to the nearest tenth

Z=1.45

Refer the z table for p value

p value = 0.9265

Hence 92.65 % light bulbs last less than 2080 hours

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

wow ok so the answer is 1k or just k

because of combining like terms xd