Write the equation for the shape described.The circle with endpoints of a diameter at (2, 9) and (6, 1)
A. (x - 4)2 + y2 = 16
B. (x - 5)2 + (y - 4)2 = 20
C. x2 + (y - 5)2 = 4
D. (x - 4)2 + (y - 5)2 = 20
Answer: D
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Replace the Cartesian equation with an equivalent polar equation.xy = 1
A. 2r2 sin ? cos ? = 1 B. r sin 2? = 2 C. 2r sin ? cos ? = 1 D. r2 sin 2? = 2
Provide an appropriate response.Describe two advantages of the substitution method over the graphing method for solving systems of equations.
What will be an ideal response?
Solve the problem.Bob, the incredible shrinking man, loses half of his height each day after he was exposed to a mysterious form of cosmic radiation. How many days before he is literally "knee-high to a grasshopper"? Assume that a grasshopper's knee is 4 millimeters high and that Bob is 2 meters tall. Round your answer to the nearest whole day. (1000 millimeters = 1 meter)
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The following data represent the marital status of females 18 years and older in a certain U.S. city. 
Determine the number of females 18 years old and older who are married or widowed.
A. 368,000 B. 370,000 C. 307,000 D. 431,000