Solve the problem.There is a 3-degree drop in temperature for every thousand feet that an airplane climbs into the sky. If the temperature on the ground is 51 degrees, what will be the temperature when the plane reaches an altitude of 20,000 feet?
A. -31 degrees
B. -9 degrees
C. 9 degrees
D. 31 degrees
Answer: B
Mathematics
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A. w = 20i + 4j B. w = 4i + 3j C. w = -10i - 25j D. w = 15i - 6j
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hours per week. He has already practiced 2
hours. How many more hours does he need to practice?
A. 7 hr
B. 6
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C. 7
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D. 8
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Find a and b.If 0 < 2x < 6, then a < x2 < b.
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Mathematics