Provide an appropriate response.Write using the letter i, simplifying if possible: 
A. -6i
B. 6i
C. -18i
D. 18i
Answer: B
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A fair coin is thrown. Let A be the event "at most four heads appear" and B be the event "exactly two heads appear."Find Pr(B|A).
What will be an ideal response?
Solve the problem.An object is propelled vertically upward from the top of a 160-foot building. The quadratic function 
models the ball's height above the ground, 
in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary.
A. 2 seconds B. 7.5 seconds C. 0.6 seconds D. 15.6 seconds
Identify the probability statement as empirical or not.The probability of an adult male's height being at least 6 feet is 0.25.
A. Not empirical B. Empirical
Factor out the GCF from the polynomial. If the GCF is 1, write prime.32y2 - 4y
A. 4(8y2 - y) B. 4y(8y - 1) C. y(32y - 4) D. 4(8y2 + y)