Identify the interval where f is increasing or decreasing, as indicated. Express your answer in interval notation.f(x) = -5x2 + 4; decreasing

A. [0, ?)
B.
C. (-?, ?)
D.


Answer: A

Mathematics

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Solve the problem.Assuming all the necessary derivatives exist, show that if = 0 for all closed curves C to which Green's Theorem applies, then f satisfies the Laplace equation  +   = 0 for all regions bounded by closed curves C to which Green's Theorem applies.

What will be an ideal response?

Mathematics

Solve the problem.Strontium 90 decays at a constant rate of 2.44% per year. Therefore, the equation for the amount P of strontium 90 after t years is P = P0 e-0.0244t. How long will it take for 15 grams of strontium to decay to 5 grams? Round answer to 2 decimal places.

A. 45.03 years. B. 450.25 years C. 4.50 years D. 40.50 years

Mathematics

Find all complex-number solutions by using the quadratic formula.-4x2 = -3x + 1

A.
B.
C.
D.

Mathematics

Assume that the graph has Origin symmetry. Select the complete graph of the equation. ? ?

A. ?

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B. ?


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C. ?


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D. ?



E. ?



Mathematics