The company installs 5000 light bulbs with an average of 500 hours for each bulb. The standard deviation of 100 hours and distribution approximated by a normal curve. The percentage of bulbs that can be expected to last the period of time of less than 690 hours is 97.1%. This will make the answer to be C.
So you know 50% means half right? So then do 32*2 and you get 64.
Answer:
10
I dont need brainliest
Brainley patrol took down my question :(
One pace because -1 plus 1 is 0
