Answer:
95.64% probability that pledges are received within 40 days
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean 
and standard deviation 
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
What is the probability that pledges are received within 40 days
This is the pvalue of Z when X = 40. So
has a pvalue of 0.9564
95.64% probability that pledges are received within 40 days
Answer: Depends which one you need more.
Step-by-step explanation:
Answer:
240
Step-by-step explanation:
Given that each book on a certain shelf is labeled by a single category. For every 2 history books, there are 7 fantasy books and for every 3 fantasy books, there are 5 reference books
Let history, fantasy and reference books be x,y,z
Then x:y =2:7, y:z = 3:5
Or x:y:z =6:21:35
Now when we double x:y we get
x:y = 4:7 while y:z=3:5
we get
x:y:z = 12:21:35
Original fantasy books = 
New fantasy books = 
Difference = 0.3387-0.3088
=0.299
Approxly 3 is differene equivalent to 60
So new X = 
Joy wants to get from King Arthur’s Restaurant located at (9,6) to Dragon Fire located at (13, 3). Determine the length of the line segment between the two points. If one unit represents five metres, what is the total length between the two points?
