Express each set in interval notation.
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Solve the polynomial inequality and graph the solution set on a number line. Express the solution set in interval notation.x2 + 7x ? 0
A. (-?, -7]
B. (-?, -7] ? [0, ?]
C. [0, ?]
D. [-7, 0]
Use the graph to answer the question.
Mike decides to buy shares of companies X and Y, which were initially selling for the same price. The changes in each stock's value over 90 days are shown in the graph above. When did the two stocks have the same value, other than when he bought them?
A. day 90 B. day 80 C. day 85 D. day 50
Solve the problem.A rectangular box with square base and no top is to have a volume of 32 ft3. What is the least amount of material required?
A. 36 ft2 B. 42 ft2 C. 48 ft2 D. 40 ft2
Find the angle between the planes.-7x - 2y - 6z = -5 and 4x + 2y - 9z = -2
A. 1.412 B. 1.337 C. 0.605 D. 0.234