You basically simplify for this one,18 / ? = 9
18/2=9
So in this case, 8*2 is 16! Hope this helps!
Answer:
Step-by-step explanation:
Answer: it will take 3.4 days to finish the book.
Step-by-step explanation:
Let x represent the number of days that it will take sal to finish reading the book.
Sals book has a total number of 52 pages.
Sal already read 18 pages. This means that the number of pages left for Sal to read would be
52 - 18 = 34
He plans to read 10 pages each day until he finishes the book. This means that the number of days it will take Sal to finish the book would be
10x = 34
x = 34/10 = 3.4
Answer:
(221.39, 300.61) and (255.2223, 266.7777)
Step-by-step explanation:
Given that X, the lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of 17 days
Middle 98% would lie on either side of the mean with probability ±2.33 in the std normal distribution on either side of 0
Corresponding we have x scores as
Between and
i.e. in the interval = (221.39, 300.61)
If sample size = 47, then std error of sample would be
So 98% of pregnancies would lie between
and
= (255.2223, 266.7777)