Assume that the probability that an airplane engine will fail during a torture test is 
and that the aircraft in question has 6 engines. Find the probability that all engines will survive the test.
?
A. 
B. ?
C. ?
D. ?
Answer: A
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Solve the problem.A recipe calls for 
cup of butter. How much is needed to double the recipe?
A. 
c
B. 
c
C. 
c
D. 
c
Solve the problem.A ball is thrown downward from a window in a tall building. Its position at time t in seconds is given by 
where s is in feet. How long will it take the ball to fall 
Round to the nearest tenth, if necessary.
A. 3.6 sec B. 1.9 sec C. 2.7 sec D. 1.7 sec
Find the common ratio r for the given infinite geometric sequence.3, -9, 27, -81, 243, ...
A. 3
B. -12
C. - 
D. -3
Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = 8, y = -1, z = 6; (8, -1, 6) B. x = 1, y = 6, z = 1; (1, 6, 1) C. x = 7, y = 1, z = 6; (7, 1, 6) D. x = 7, y = -1, z = -6; (7, -1, -6)