Which of the following is the best approximation of 3 times the positive square root of 19?
57
13.1
21.7
6.9
Correct Answer : B
We use the calculator to find the positive square root of 19, which is then multiplied by 3.
Using the calculator, 
Multiplying the square root above with 3 becomes

The approximate value of 3 times the square root of 19 is 13.1.
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Explanation
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Number of boxes

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Correct Answer is C
Explanation
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Total test scores = 83+86+76+88+97 = 430
Number of tests = 5
Mean test score = 430/5 = 86
The mean test score is 86.
Correct Answer is B
Explanation
To find the median of a data set, we need to first order the data from least to greatest, then find the middle value.
Step 1: Order the data from least to greatest:
The original data set is:
12,19,7,14,22,26,15
Ordered from least to greatest:
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Step 2: Find the middle value
Since there are 7 numbers (an odd number of data points), the median will be the middle value, which is the 4th number in the ordered list.
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The middle value is 15.
Conclusion:
The median of the data set is 15.
The correct answer is B. 15.
Correct Answer is B
Explanation
Before finding the greatest number from the data set, the numbers need to be in fraction form.
-0.5=-5/10
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The set of numbers becomes -2/3, -5/10, -15/10, -4/9
Now the least common denominator for 3, 10, and 9 is 90, which will be used to multiplied by the given fractions as follows:
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Explanation
Based on the given scenario, the outcome of measuring the daily dollar rate is the decline in investment, stock prices, and forex exchange. The three outcomes are dependent variables while the dollar rate is the independent variable.
Correct Answer is D
Explanation
The probability of finding a green ball is given by

Â
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Therefore, the probability of drawing a green ball from the bag containing 17 balls is 6/17.
Correct Answer is A
Explanation
A. A=w(2w+1)
Explanation
The area of a rectangle is given by the formula:
A=length×width
Given that the length is one more than twice the width, we can express it as:
Length=2w+1
The width is simply w.
Now, substituting these into the area formula:
A=w(2w+1)
Thus, the correct answer is:
A=w(2w+1)
Correct Answer is B
Explanation
We use the calculator to find the positive square root of 19, which is then multiplied by 3.
Using the calculator, 
Multiplying the square root above with 3 becomes

The approximate value of 3 times the square root of 19 is 13.1.
Correct Answer is B
Explanation
A histogram is used to visualize the frequency of a one variable over the other while a line graph is used to compare two variables.
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Explanation
Here we utilize the dimensional analysis of units of measurement of length to convert yards to cm as follows

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