Write the expression as a pure imaginary number.

A. ±13 
B. 13i 
C. -13i 
D. -i


Answer: B

Mathematics

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Find an exponential model for the following data set. Round your answer to two decimal places.  t 0 1 2 3 y 3.02 5.13 8.72 14.82?

A. ?
B. ?
C. ?
D. ?

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Parametrize the surface S.S is the portion of the cone  +   =  that lies between z = 2 and z = 5.

What will be an ideal response?

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The scores on a 30-point multiple-choice exam are given in the following frequency table: The first quartile on the exam is

A. 25. B. 24.5. C. 24. D. 25.5. E. none of these

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Determine whether the expression represents a number that is positive, negative, or zero.(-3)-3

A. Positive B. Zero C. Negative

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