Find the reciprocal of the number.
A. 
B. 3?
C. - 
D. ?
Answer: A
Mathematics
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Solve the problem.Suppose that R ={(x, y): 0 ? x ? 4, 0 ? y ? 4}, and P is the partition of R into four equal squares by the lines x =2 and y = 2. 
approximate 
by calculatiang the Riemann sum 
, assuming that 
are the centers of the four squares.
A. 96 B. 48 C. 384 D. 192
Mathematics
Use absolute value notation to describe the situation. ? The distance between x and -12 is at least 5. ?
A. |x + 12| > 5 B. |x + 12| ? 5 C. |x + 12| = 5 D. |x + 12| < 5 E. |x + 12| ? 5
Mathematics
Use a calculator to evaluate the expression. (Round your answer to three decimal places.)
?
A. 1.523 × 1010 B. 1.523 × 1011 C. 3.222 × 109 D. 3.222 × 1011 E. 3.222 × 1010
Mathematics
Decide whether vertex A of the network is even or odd.
A. Even B. Odd
Mathematics