The graph of a logarithmic function is shown. Select the function which matches the graph.
A. y = 1 - log5x
B. y = log5x
C. y = -log5x
D. y = log5(-x)
Answer: D
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Solve the problem.Let y = -9x + 221 represent the number of students present in a large class, where x represents the number of hours of study required weekly. What is the rate of change of the number of students in the class with respect to the number of hours of study?
A. -221 students per hour of study time B. 221 students per hour of study time C. 9 students per hour of study time D. -9 students per hour of study time
Solve the problem.The half-life of radium is 1690 years. If 150 grams is present now, how long (to the nearest year) till only 100 grams are present?
Fill in the blank(s) with the appropriate word(s).
Solve the equation for the specified variable.I = Prt for r
A. r = P - tI
B. r = 
C. r = 
D. r = 
Provide an appropriate response.True or false? The LCD of the two fractions 
and 
is 
if the greatest common factor of a and c is not 1.
A. True B. False