Solve the problem.Assume that a person's threshold weight W, defined as the weight above which the risk of death rises dramatically, is given by W(h) = 
3, where W is in pounds and h is the person's height in inches. Find the threshold weight for a person who is 6 ft 7 in. tall. Round your answer to the nearest pound.
A. 161.6 lb
B. 296.3 lb
C. 221.5 lb
D. 265 lb
Answer: D
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Graph on the number line, and express in interval notation.The set of all real numbers greater than or equal to 4.
A. (-?, 4]
B. (4, ?)
C. [4, ?)
D. (-?, 4)
Solve the problem.A water tank is formed by revolving the curve y = 3x4 about the y-axis. Water drains from the tank through a small hole in the bottom of the tank. At what constant rate does the water level, y, fall? (Use Torricelli's Law: dV/dt = -m
.)
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Perform the indicated operations.Estimate by rounding to the nearest thousand, then find the actual difference.65,410
A. Estimate: 35,900 Actual: 35,846 B. Estimate: 35,800 Actual: 35,846 C. Estimate: 35,000 Actual: 35,846 D. Estimate: 36,000 Actual: 35,846
Determine the standard equation of the ellipse described.Focus at (-2, 0); vertices at (-6, 0) and (6, 0).
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1