Solve the problem.Let y(t) be the concentration of a substance in a chemical reaction. The change in the concentration, under appropriate conditions, is modeled by the equation  where k > 0 is a rate constant and the positive integer n is the order of the reaction. Solve the initial value problem for a third-order reaction , assuming y(0) = 3 and k = 0.3.

A. y = 
B. y = 
C. y = 
D. y = - 


Answer: A

Mathematics

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Determine what the next equation would be, and verify that it is indeed a true statement.(1 × 9) - 6 = 3(21 × 9) - 6 = 83(321 × 9) - 6 = 2883

A. (432 × 9) - 6 = 38,883 B. (4,321 × 9) - 6 = 3882 C. (4,321 × 9) - 6 = 28,883 D. (4,321 × 9) - 6 = 38,883

Mathematics

Solve the problem.A survey of senior citizens at a doctor's office shows that 53% of the seniors take blood pressure lowering medication and 47% take cholesterol lowering medication. 6% take both medications. What is the probability that a senior citizen takes only one of these medications given that he or she takes at least one of the medications?

A. 0.53 B. -0.060 C. 0.940 D. 0.47

Mathematics

Use the associative law of multiplication to write an equivalent expression.9[m(7 + n)]

A. 63m + 9n B. (9m)(7 + n) C. (9m)(7n) D. 9[m(n + 7)]

Mathematics

Write the percent as a fraction or mixed number in lowest terms.175%

A. 3
B. 1
C.
D. 17

Mathematics