Answer: The value of b = 0.99
The probability that a day requires more water than is stored in city reservoirs is 0.161.
Step-by-step explanation:
Given : Water use in the summer is normally distributed with

Standard deviation : 
Let x be the combined storage capacity requires by the reservoir on a random day.
Z-score : 

The probability that a day requires more water than is stored in city reservoirs is :
Hence, the probability that a day requires more water than is stored in city reservoirs is 0.161
701 = 21 + 68w
701-21= 680
680/68=10
w=10
Look at the ratio (2:3). You can see that the numbers of "ratio units" add up to 5, and that the total number of books is 100 times that value. Then each "ratio unit" stands for 100 books.
3 ratio units of chapter books mean there are 300 chapter books.
<h2>
<u>Mark as Brainliest</u></h2>
If O is the orthocenter, O=(xo, yo)
such that xo=(2+0 + 2)/3, so xo= 4/3, so the answer must be
<span>d) (4/3, 7/12)</span>