Rationalize the denominator. - 
A. - 
B. -3
C. -20
D. - 
Answer: D
Mathematics
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Evaluate the indicated power of i.i57
A. -1 B. -i C. 1 D. i
Mathematics
Use a calculator to find an approximate value for s in 
having the given circular function value. Round your answer to eight decimal places.cot s = 7.85259066
A. 1.15652058 B. 3.26825738 C. 0.12666473 D. 1.58572425
Mathematics
Factor the sum or difference of two cubes completely.729x3 + 1
A. (9x + 1)(81x2 - 9x + 1) B. (9x + 1)(81x2 + 1) C. (9x + 1)(81x2 - 9x - 1) D. (9x + 1)(81x2 + 9x + 1)
Mathematics
Use a calculator to evaluate the expression. Round the answer to three decimal places.-(-1.57)-2
A. -0.406 B. 2.465 C. 0.406 D. -2.465
Mathematics