Solve the equation.-3x + 8 + 4x = 0
A. {0.625}
B. {8}
C. {1.6}
D. {-8}
Answer: D
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Solve the problem.The annual population density of a species of insect after n years is modeled by a sequence. Suppose that the initial density of insects is 620 with r = 1.9. Write a recursive sequence that describes this data, where an denotes the insect density during year n.Find the terms a1 , a2 , a3 , ...., a5 . Round to two decimal places, if necessary.
A. a1 = 1178.00, a2 = 2238.20, a3 = 4252.58, a4 = 8079.90, a5 = 15,351.81 B. a1 = 620, a2 = 62.00, a3 = 6.20, a4 = 0.62, a5 = 0.06 C. a1 = 620, a2 = 1178.00, a3 = 2238.20, a4 = 4252.58, a5 = 8079.90 D. a1 = 620, a2 = 620, a3 = 620, a4 = 620, a5 = 620
Solve the problem.The function Y(x) = 51.38 ln 
can be used to estimate the number of years Y(x) after 1980 required for a certain country's population to reach x million people. In what year will the country's population reach 13 million?
A. About 2025 B. About 2045 C. About 2035 D. About 2040
Solve the polynomial equation by factoring.x3 + 3x2 - x - 3 = 0
A. 1, -1, 3 B. 1, -1, -3 C. 1, -1, -4 D. 1, -2, 5
Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.
3
A. 
B. 
C. 
D. 