Answer:
For the 99th percentile, we have X = 206 seconds.
Step-by-step explanation:
Problems of normally distributed samples can be 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:
99th percentile:
Value of X when Z has a pvalue of 0.99. So we use 
For the 99th percentile, we have X = 206 seconds.
Answer:
-6
Step-by-step explanation:
The pattern here is that you substract 15 every time you move a number (left to right) , therefore: 9-15 = -6
If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)
Answer: $2,446.08
Step-by-step explanation:
Lets convert the length and width into decimal form so it's easier to understand.
24 1/2= 24.5
12 4/5= 12.8
Now we must multiply to get the area. 24.5x12. 8= 313. 6 ft
Each square inch costs .65 so we must multiply .65 by 12 to see how much a foot costs. 12x0.65= 7.8
Now that we know how much each foot cost lets multiply 313.6 by 7.8. 313.6x 7.8= $2446.08
Answer:
i believe its $28..
Step-by-step explanation:
