The amount of time a certain brand of light bulb lasts is normally distributed with a mean of 1600 hours and a standard deviation of 70 hours. Using the empirical rule,
determine what interval of hours represents the lifespan of the middle 99.7% of light
bulbs.
help fast please!!

first multiple they 1600 and 70 hours if you'll get the answer go divide with the 99.7 and then the Answer is 1,123

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)

false

step-by-step explanation:

false : it can not go to 9 the highest that part can go is 7

here is your proof