Find the value of the exponential expression.(0.3)4
A. 0.075
B. 81
C. 0.0081
D. 1.2
Answer: C
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Solve the problem.Use the formula L = 10 ? log 
, where the loudness of a sound in decibels is determined by I, the number of watts per square meter produced by the soundwave, and 
A certain noise produces 6.35 × 10-4 W/m2 of power. What is the decibel level of this noise?
A. 203 dB B. 78 dB C. 88 dB D. 9 dB
Solve the problem. A reasonable quadratic model for the population of a certain city is found to be 
where B(t) is the population (in thousands) of the city in the year that is t years since 2002. A reasonable quadratic model for the number of residents of that city who were born outside the United States is 
where F(t) is the number (in thousands) of foreign-born residents of the city in the year that is t years since 2002. Let P(t) be percentage of residents of the city who were born outside the United States in the year that is t years since 2002. By
finding an equation for P, determine the percentage of residents of the city who were born outside the United States in the year 2017. A. 0.152% B. 13.8% C. 0.138% D. 15.2%
Solve the problem.In September 1998 the population of the country of West Goma in millions was modeled by 
At the same time the population of East Goma in millions was modeled by 
In both formulas x is the year, where 
corresponds to September 1998. Assuming these trends continue, estimate the year when the population of West Goma will equal the population of East Goma.
A. 2008 B. 2011 C. 2009 D. 1987
Find the derivative of the function.y = sin 2e5x
A. 
= cos 2e5x
B. 
= e5x cos 2e5x
C. 
= 10e5x cos 2e5x
D. 
= -10e5x cos 2e5x