Solve.x2 + 2x - 4 ? 0
A. (-?, -1 - 
] ? [-1 + 
, ?)
B. (-?, -1 - 
) ? (-1 + 
, ?)
C. (-?, -
] ? [
, ?)
D. [-1 - 
, -1 + 
]
Answer: A
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Assume that the probability that an airplane engine will fail a test is 
and that the aircraft in question has 4 engines. What is the probability that exactly 1 engine(s) will survive the test?
?
A.
B.
C.
D.
Solve the problem.To get credit for graduation, Brittany completed 20 hours of community service. She worked at a soup kitchen for 
of the time. She picked up litter along highways for 
of the time. The rest of the hours she spent tutoring younger children after school. How much time did Brittany spend tutoring?
A. 5
hours
B. 7
hours
C. 5
hours
D. 6
hours
Solve the given differential equation.4y" - 5y' + 5y = 0
A. y = ex
/8 
B. y = e5x/8 
C. y = c1e5x/8 + c2 ex
/8
D. y = e-5x/8 
Multiply. Write the answer in descending order and combine like terms.(2x3 + 6)(2x3 - 6)
A. 4x6 - 24x - 36 B. 4x6 - 36 C. 4x2 + 24x - 36 D. 4x3 - 36