The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 1 + 2 sin ?
A. x2 + y2 = 
+ 2y
B. 
= x2 + y2 + 2y
C. 
= x2 + y2 + 2x
D. x2 + y2 = 
+ 2x
Answer: A
Mathematics
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Carry out the indicated unit conversion. Round your answer, if appropriate.Convert a lot size of 
acre to square feet (1 acre = 43,560 ft2).
A. 737 square feet B. 726 square feet C. 7260 square feet D. 7370 square feet
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Evaluate the integral.
A. 
sin 4t - 
sin 2t + C
B. 
sin 2t + 
sin 6t + C
C. 
sin 2t - 
cos 6t + C
D. 
sin 2t - 
sin 6t + C
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Multiply.(3x + 4)(x + 11)
A. 3x2 + 35x + 44 B. 3x2 + 44x + 37 C. 3x2 + 37x + 37 D. 3x2 + 37x + 44
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Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62 B. 0.26 C. 0.22 D. 0.50
Mathematics