Find the product of the complex number and its conjugate.-i

A. -1
B. i
C. -i
D. 1


Answer: D

Mathematics

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Use a power regression model for the following data to estimate . Round your answer to two decimal places.  x 2.03 3.38 4 6.49 7.6 y 8.15 4.55 4.62 3.92 4.17?

A. 3.30 B. 0.10 C. -0.63 D. 3.71

Mathematics

Calculate the derivative of the function. Then find the value of the derivative as specified.g(x) = 3x2 - 4x; g '(3)

A. g '(x) = 3x - 4; g '(3) = 5 B. g '(x) = 6x - 4; g '(3) = 14 C. g '(x) = 6x; g '(3) = 18 D. g '(x) = 2x- 4; g '(3) = 2

Mathematics

Simplify by first converting to rational exponents. Assume that all variables represent positive real numbers. ? 

A.
B.
C.
D.

Mathematics

Solve the problem.If a ball is thrown upward from the ground with an initial velocity of 128 feet per second, its height after t seconds is given by the function h(t) = -16t2 + 128t. Find the number of seconds before the ball lands on the ground.

A. 112 seconds B. 64 seconds C. 4 seconds D. 8 seconds

Mathematics