Find all solutions of the equation in the interval [0, 2?).2 cos2 x - 1 = 0
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Provide an appropriate response.Higgens buys toy trucks for $12.00 each and sells them for $16.00. The markup based on cost is 23.1%.
A. True B. False
Mathematics
Solve the problem.Jay drove 296 kilometers at the average rate of 74 kilometers per hour. How long did the trip take?
A. 3 hr
B. 5 hr
C. 
hr
D. 4 hr
Mathematics
Solve. Check for extraneous solutions.
= x - 3
A. {1, 6} B. {6, 13} C. {1, 13} D. {6}
Mathematics
Find the area.
A. 21 in.2 B. 98 in.2 C. 196 in.2 D. 49 in.2
Mathematics