Perform the indicated operations. 

A. -1
B. 1
C. 9
D. -9


Answer: B

Mathematics

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Use properties of logarithms to write the expression in terms of logarithms of x, y, z.log4   

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Solve.The distance D that a spring is stretched by a hanging object varies directly as the weight W of the object. If a 25-kg object stretches a spring 89 cm, find the distance the spring is stretched when the weight is 18-kg. Round to the nearest hundredth of a centimeter if necessary.

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Solve the problem.The half-life of silicon-32 is 710 years. If 90 grams is present now, how much will be present in 800 years? (Round your answer to three decimal places.)

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