Solve the problem.Of the people Stephen called, 12 agreed to donate money. This amounted to 5% of all the people he called. How many people did he call?
A. 230 people
B. 240 people
C. 290 people
D. 2400 people
Answer: B
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Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 0; local maximum at x = 2; concave down on (0, ?); concave up on (-?, 0) B. Local minimum at x = 0; local maximum at x = 2; concave up on (0, ?); concave down on (-?, 0) C. Local minimum at x = 2; local maximum at x = 0; concave down on (0, ?); concave up on (-?, 0) D. Local minimum at x = 2; local maximum at x = 0; concave up on (0, ?); concave down on (-?, 0)
Solve the problem.To find the height of this tree, Juanita marked the tree at eye level, 1.8 meters above the ground. She measured 39 m from the base of the tree and then held a 5-cm ruler vertically in front of her eye until the ruler just obscured the tree above the mark. Using a string tied through a hole in one end of the ruler, Juanita found that the distance from her eye to the ruler was 5.7 centimeters. What was the height of the tree? Round to the nearest unit.
A. 34 m B. 36 m C. 40 m D. 30 m
Solve the inequality. Write the solution set in interval notation.
> 0
A. (-?, ?) B. (-?, -4) ? (4, ?) C. ? D. (-4, 4)
Write in scientific notation.531.392
A. 5.31392 × 10-2 B. 5.31392 × 10-3 C. 5.31392 × 103 D. 5.31392 × 102