Perform the indicated operation.(9x - 5y)(9x + 5y)

A. 81x2 - 25y2
B. 81x2 + 90xy - 25y2
C. 81x2 + 25y2
D. 81x2 - 90xy - 25y2

Answer: A

Mathematics

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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = ln(t3 - 5t2 + 4)i  - j - 8cos(t)k

A. v(0) = - j
B. v(0) = i - j
C. v(0) = j
D. v(0) = i - j + 8k

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A. -  5+ sec-1 + C
B. -  5+ C
C. -  5+ C
D. -  

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Provide an appropriate response.Explain in your own words why the book values of an asset may never be less than the salvage value.

What will be an ideal response?

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Find the absolute value of the complex number.z = -23

A. 0 B. 23 C. -23 D. 46

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