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Question 1 of 10
1. Question
One third of the candidates for a job were 25 years old or younger. Two sevenths of the candidates were at least 50 years old. If 84 people applied for the job, how many were between 25 and 50?
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Question 2 of 10
2. Question
Which of the following is a factor of 450 and multiple of 25?
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Question 3 of 10
3. Question
The formula h – 15 = 3.2t gives the height h in inches of a plant t weeks after planting.
Which is the rate at which the plant’s height is increasing?
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Question 4 of 10
4. Question
The formula h -15 = 3.2t gives the height h in inches of a plant t weeks after planting.
How high was the initial height of the shrub?
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Question 5 of 10
5. Question
The formula h -15 = 3.2t gives the height h in inches of a plant t weeks after planting.
When was the height 31 inches?
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Question 6 of 10
6. Question
A graph of the temperature T (degrees Fahrenheit) in a refrigerator t hours after midday.
What is the equation of the axis of symmetry of this graph?
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Question 7 of 10
7. Question
A graph of the temperature T (degrees Fahrenheit) in a refrigerator t hours after midday.
It is necessary to find the times when the temperature is 8o F. Which of the following is the correct equation to do this.
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Question 8 of 10
8. Question
Which of the following is the equation of the straight line joining the points on the graph corresponding to t = 2 and t = 1?
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Question 9 of 10
9. Question
The formula for the volume V of the sphere = 4(pi)r3 / 3. Which of the following is the closest approximation to the volume when r, the radius, is 11 inches?
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Question 10 of 10
10. Question
If the radius of the sphere were doubled by what factor would the surface area be enlarged?
CorrectIncorrectHint
The formula for the surface area S of the sphere = 4 x (pi) x r2