Determine whether or not the graph represents a function.
A. function
B. not a function
Answer: A
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Solve.The amount of particulate matter left in solution during a filtering process is given by the equation 
where n is the number of filtering steps. Find the amounts left for 
and 
(Round to the nearest whole number.)
A. 800, 25 B. 1600, 50 C. 800, 50 D. 800, 12,800
Evaluate the expression.-73
A. 21 B. -21 C. -343 D. 343
Find the domain and range of the inverse of the given function.f(x) = 3.9 - 2.25x
A. Domain: all real numbers; range: [3.9, ?) B. Domain and range: all real numbers C. Domain: all real numbers; range: (?, 3.9] D. Domain: [3.9, ?); range: all real numbers
Solve using the quadratic formula. Use a calculator to approximate the solutions to the nearest thousandth.6x2 - 16x + 7 = 0
A. 1.052, 2.615 B. 0.652, 2.215 C. 0.552, 2.115 D. -0.448, 1.115