Solve the inequality.x2 + 4x ? 0
A. (-?, 0] or [4, ?)
B. [0, 4]
C. [-4, 0]
D. (-?, -4] or [0, ?)
Answer: D
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Provide an appropriate response.The sum of an infinite geometric series exists if:
A. 
? 1
B. 
< 1
C. 
? 1
D. 
> 1
Solve the problem.Island A is 150 miles from island B. A ship captain travels 250 miles from island A and then finds that he is off course and 160 miles from island B. What angle, in degrees, must he turn through to head straight for island B? Round the answer to two decimal places. (Hint: Be careful to properly identify which angle is the turning angle.)
A. 55.08° B. 110.17° C. 34.92° D. 145.08°
Classify the angle as acute, right, obtuse, or straight.55°
A. acute B. right C. straight D. obtuse
Divide. Write a mixed numeral for the answer whenever possible.24 ÷ 8
A. 2
B. 3
C. 208
D. 2