The graph of an exponential function is given. Match the graph to one of the following functions.
A. f(x) = 5x
B. f(x) = 5-x
C. f(x) = -5-x
D. f(x) = -5x
Answer: D
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Solve the problem. If necessary, round to the nearest tenth.If friction is ignored, the time t (in seconds) required for a block to slide down an inclined plane is given by the formula t = 
where a is the length (in feet) of the base and g ? 32 feet per second per second is the acceleration of gravity. How long does it take a block to slide down an inclined plane with base a = 10 when 
A. 1.1 sec B. 1.2 sec C. 0.9 sec D. 0.3 sec
Determine whether the expression represents a number that is positive, negative, or zero.(-3)-3
A. Positive B. Zero C. Negative
Solve the problem.When 40% of a number is added to the number, the result is 168. What is the number?
A. 140 B. 29 C. 120 D. 48
Write the expression as a logarithm of a single expression. Assume that variables represent positive numbers.3 loga (2x + 1) - 2 loga (2x - 1) + 2
A. loga 2(x + 1)
B. loga 
C. loga (2x + 3)
D. loga (2x + 1) + 2