Find the probability.A bag contains 4 red marbles, 5 blue marbles, and 7 green marbles. What is the probability of choosing a blue marble?
A. 
B. 
C. 
D. 
Answer: B
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Use the formula for the sum of the first n terms of an arithmetic sequence to find the indicated sum.
A. -2550 B. -2548 C. -2601 D. -2499
Solve the equation.64k2 - 25 = 0
A. {5, 0}
B. 
C. 
D. 
Construct the specified histogram.The frequency table below shows the number of days off in a given year for 30 police detectives. 
Construct a histogram. 
What will be an ideal response?
Solve the variation problem.The voltage across a resistor is jointly proportional to the resistance of the resistor and the current flowing through the resistor. If the voltage across a resistor is 
for a resistor whose resistance is 
and when the current flowing through the resistor is 
find the voltage across a resistor whose resistance is 
when
the current flowing through the resistor is 
A. 48 volts
B. 24 volts
C. 42 volts
D. 56 volts