Divide.

A. + 2 + 
B. - 3 + 
C. - 2 + 
D. - 2


Answer: C

Mathematics

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The position vector of a particle is r(t). Find the requested vector.The acceleration at t =  for r(t) = (9 sin 2t)i  - (8 cos 2t)j + (9 csc 2t)k

A. a = -36i - 36k
B. a = -36i + 36k
C. a = 36i + 36k
D. a = 32j + 36k

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Using the Law of Sines, find angle C and sides a and b if angle A = 30ø, B = 70ø and side c = 10.

What will be an ideal response?

Mathematics

The distribution of the math SAT test scores at a local college is approximately Normal (630, 120) .

(a) What is the percentage of the scores is below 550? (b) What is the percentage of the scores is above 650?

Mathematics

Solve the problem.A survey revealed that 50% of people are entertained by reading books, 33% are entertained by watching TV, and 17% are entertained by both books and TV. What is the probability that a person will be entertained by either books or TV? Express the answer as a percentage.

A. 17% B. 83% C. 66% D. 100%

Mathematics