I don't see any answer choices, so I'm just going to attach an image of the equations graphed on Desmos.
Desmos is a free, online graphing calculator that works really well for problems like this. If you want to get a better view of the graphs and to be able to "interact" with them, just go to the desmos website and put in your equation(s). The picture that I've attached might not be very helpful because it doesn't show the full extent of the graph, so you might want to check it out and do it yourself.
Hope this helps!
Answer: -p - 30
Step-by-step explanation:
Answer:
The probability that a randomly chosen light bulb will last less than 900 hours is 0.1587.
Step-by-step explanation:
The life span of these light bulbs is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours
Mean = 
Standard deviation =
We are supposed to find the probability that a randomly chosen light bulb will last less than 900 hours.i.e. P(x<900)
So, 
Z=-1
P(x<900)=P(z<-1)=0.1587
Hence the probability that a randomly chosen light bulb will last less than 900 hours is 0.1587.
Answer:
I think u should do like this
