Multiply.
? 
? 2
A. 
B. 
C. 12
D. 3
Answer: C
Mathematics
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Evaluate.cos2 315° - sin2 270° + 4 tan2 30°
A. - 
B. 
C. 
D. 
Mathematics
Find an equation for the circle.Center at (3, 0), radius 9
A. (x - 3)2 + y2 = 81 B. (x + 3)2 + y2 = 81 C. x2 + (y + 3)2 = 9 D. x2 + (y - 3)2 = 9
Mathematics
Solve.
+ 
= -1
A. 5
B. - 
C. 0
D. No solution
Mathematics
Solve the problem.The length a spring is stretched from its natural length with work, W
is given by L = 
where k is a constant for the given spring. If a certain spring has a constant of 61.8, and the spring is to be stretched 1.9 feet from its natural length, how much work will be necessary? Round your answer to the nearest tenth.
A. 223.1 foot-pounds B. 58.7 foot-pounds C. 111.5 foot-pounds D. 42.6 foot-pounds
Mathematics