Answer:
The percentage of students who scored below 620 is 93.32%.
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 question, we have that:
Percentage of students who scored below 620:
This is the pvalue of Z when X = 620. So
has a pvalue of 0.9332
The percentage of students who scored below 620 is 93.32%.
Answer:
the volume of the cone is 339.29
Step-by-step explanation:
Answer:
150 tickets
Step-by-step explanation:
Given: Tickets sold at four different gates
Gate B sold 26 % tickets
Tickets sold at Gate B = 39
Let take x as total number of tickets sold at all four gates.
Now, using the value of gate B to find total number of tickets
∴ 
⇒ 
Next, cross multiply both side
⇒ 
∴ Total tickets sold at all the four gates is 150
Answer: 18
Step-by-step explanation:
The least common denominator of 
and 
is going to be a multiple of 9 and 6. Let us list them out:
9: 9, <u>18</u>, 27, 36, 45, 54, 63, 72, 81, 90
6: 6, 12, <u>18</u>, 24, 30, 36, 42, 28, 54, 60
You can see I bolded and underlined 18. Why? This is the first common multiple of 9 and 6 so it is our least common denominator (LCD).
Imagine 2 as 2.0 and add 3.5 and that equals 5.5 add 3.5 equals 9.0. the anser is no because 5.5 it says equals 9.9 but it makes 9.0
