Answer: C.-1.5
Step-by-step explanation:
Given: The burning time of a very large candle is normally distributed with mean
of 2500 hours and standard deviation
of 20 hours.
Let X be a random variable that represent the burning time of a very large candle.
Formula: 
For X = 2470
So, the z-score they corresponds to a lifespan of 2470 hours. =-1.5
Hence, the correct option is C.-1.5.
Answer:
th answer i think is thirty
Step-by-step explanation:
30 + 10 = 40 and it said at most $50
tell me if i'm wrong
Answer:
12% is the answer for this question
Answer:
14/20.
Step.-by-step explanation:
There are 20 socks in the drawer.
The number which are not brown = 9 + 5 = 14.
So the required probability = 14/20.
Answer:
Step-by-step explanation:
you do reverse so 1,721 - 999 = k
1,721 - 999 = 722
so k = 722
