Solve the problem.It is 4.7 km from Lighthouse A to Port B. The bearing of the port from the lighthouse is N73°E. A ship has sailed due west from the port and its bearing from the lighthouse is N31°E. How far has the ship sailed from the port? Round your answer to the nearest 0.1 km.
A. 3.7 km
B. 3.5 km
C. 3.1 km
D. 2.7 km
Answer: A
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Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the x-axis and the curve y = 5sin x, 0 ? x ? ?
A. 
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B. 
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C. 
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D. 
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Simplify the expression by using the order of operations.2 ? 6 + 2(7 + 3) + 4
A. 33 B. 40 C. 36 D. 164
Write the system in the form 
Then solve the linear system by computing 
with a calculator. Round numbers to the nearest tenth, as necessary.2.6x - 0.7y + 5.3z - 3.4w = 12.9 6.5y + 0.7w = -1.8 4.0z - 2.2w = 1.54.9x + 0.6w = 3.2
A. (2.2, 1.1, -6.4, -12.4) B. (-2.2, 1.1, -6.4, 23.3) C. (2.2, 1.1, 7.2, 12.4) D. (2.2, -1.1, -6.4, 7.6)
Determine whether the relation defines y as a function of x. Give the domain.y = 
A. Function; domain: (-?, ?) B. Not a function; domain (-?, 11) ? (11, ?) C. Not a function; domain: (-?, ?) D. Function; domain (-?, -1) ? (-1, ?)