Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.
log9x + log9y
A. log9y
B. log9
C. log9
D. log9
Answer: A
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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 problem.The function P, given by P(d) = 
d + 1, gives the pressure, in atmospheres (atm), at a depth d, in feet, under the sea. Find the pressure at 200 feet. Round your answer to the nearest whole number.
A. 200 atm B. 7 atm C. 201 atm D. 8 atm
Factor the trinomial completely.4m5 + 17m3n2 + 4mn4
A. m(4m2 + n2)2 B. m(4m2 + 4n2)2 C. m(4m2 + n2)(m2 + 4n2) D. prime
Express the graph shown using interval notation. Also express it as an inequality involving x.
A. (-?, 5) x < 5 B. (-5, 5] -5 < x ? 5 C. [-5, 5) -5 ? x < 5 D. [-5, 5] -5 ? x ? 5