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1 answer:
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Answer:
The standard deviation for the number of students who work full time = 8.38
Step-by-step explanation:
Given data
Sample size n = 284
No. of students work full time is P = 55 % = 0.55
No. of students who not work full time is Q = 100- 55 % = 45 % = 0.45
The standard deviation is given by
Put all the values in above equation we get
S.D. = 8.38
This is the standard deviation for the number of students who work full time.
Answer:
D
Step-by-step explanation:
Please refer to the attachment below.
We have a 30-60-90 triangle.
Hence, the ratios of the sides will be related as shown in the triangle below.
Let’s determine the value of x. In a 30-60-90 triangle, the hypotenuse is 2x.
Here, our hypotenuse is 10.
Then it follows that:
The side opposite to ∠A (60) is CB.
And it is x√3.
Hence, CB is 5√3.
The side opposite to ∠B (30) is AC.
And it is x.
Hence, AC is 5.
Therefore, AC is 5 while BC is 5√3.
Hence, our answer is D.
