Answer:
option B.
About 16% of the books have fewer than 150 pages
Step-by-step explanation:
Since we are dealing with a normal distribution
68.27% of the values will fall in the range with the standard deviation
(180-30 , 180+30) = (150, 210)
Approximately 15.86% of the values will be higher than 210
and the rest 15.86% will be lower than 150
So the correct answer is option B.
About 16% of the books have fewer than 150 pages
Let time be x distance be y
Put value in eq(2)



Put it in eq(1)
Dude, it's impossible to solve without the pic
I’m pretty sure the average rate is 2 sorry if I’m wrong have a gre day