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 900 years. How many years would be required for a given amount of this isotope to decay to 75% of that amount?
A. 299 yr
B. 225 yr
C. 374 yr
D. 1800 yr
Answer: C
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Use the rational zero test to find all the rational zeros of f(x).f(x) = 11x4 + 13x3 - 42x2 - 52x - 8
A. Zeros: -1, -2/11, 2, -2 B. Zeros: 1, 2/11, 2, -2 C. Zeros: 1, -2/11, 2, -2 D. Zeros: -1, 2/11, 2, -2
Find the linear function that is the best fit for the given data. Round decimal values to the nearest hundredth, if necessary.
A. y = 9.8x - 2.6 B. y = 10x - 3 C. y = 9x - 3 D. y = 9.2x - 2.1
Solve the problem.The following statement appears in the instructions for a game: The tile can be played immediately and the turn ends. Write the negation of the statement.
A. The tile can be played immediately or the turn does not end. B. The tile can be played immediately or the turn ends. C. The tile cannot be played immediately and the turn does not end. D. The tile cannot be played immediately or the turn does not end.
Find the indicated cross product.v = -5i - 3j - 5k, w = -6i - 4j + 5kFind v × w.
A. 2i + 35j - 55k B. 5i - 5j + 38k C. 35i - 55j - 9k D. -35i + 55j + 2k