Find the annual double-declining-balance (200% method) rate of depreciation.50 years

A. 4%
B. 500%
C. 2%
D. 1%


Answer: A

Mathematics

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Solve the problem.In the formula A = Iekt, A is the amount of radioactive material remaining from an initial amount I at a given time t and k is a negative constant determined by the nature of the material. A certain radioactive isotope has a half-life of approximately 1200 years. How many years would be required for a given amount of this isotope to decay to 70% of that amount?

A. 360 yr B. 2084 yr C. 547 yr D. 617 yr

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Simplify the radical.

A. |x + 2| B. x + 2 C. -x - 2 D. -|x + 2|

Mathematics

Write as a percent. Round the percent to the nearest tenth if necessary.

A. 180% B. 46.3% C. 83.3% D. 8.3%

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Factor the GCF from the polynomial.6x7 + 12x3 + 8x2 - 18

A. 6(x7 + 3x3 + 4x2 - 9) B. 6(3x7 + 6x3 + 4x2 - 9) C. 2(3x7 + 6x3 + 4x2 - 9) D. -2(x7 - 3x3 - 4x2 + 9)

Mathematics