Solve the given differential equation (where the function is subject to the given conditions) by using Laplace transforms.y" + 16y = 0, y
= 0, y' 
= 1
A. y = 
cos 4t
B. y = 
sin 4t
C. y = sin 4t
D. y = cos 4t
Answer: B
Mathematics
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Use the graph to answer the question.
Mike decides to buy shares of companies A, B, and C, which were initially selling for the same price. The changes in each stock's value are shown in the graph above. After how many days did stock C's value go below 
A. 60 B. 80 C. 40 D. 30
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Provide an appropriate response.Suppose a rectangle has length 
and width 
. Which of the following is the best estimate of its area?
A. 72 B. 25 C. 137 D. 34
Mathematics
Perform the indicated operation and simplify. Assume all variables represent positive real numbers.
A. 7a2 + a 
+ 
+ 
B. 7a2 + a 
+ 7a 
+ 
C. 7a2 + a 
+ 7a 
D. 7a2 + 
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Simplify.9 ? 2 - 1
A. 17 B. 18 C. 9 D. 19
Mathematics