Use the Gauss-Jordan method to find the inverse of the matrix A, where 
What will be an ideal response?
A-1 = 
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 4 for r(t) = (2 - 5t2)i + (7t + 3)j - e-5tk
A. v(4) = 40i + 7j + 5e-20k B. v(4) = -40i + 7j + 5e-20k C. v(4) = -20i +7j + 5e-20k D. v(4) = -40i + 7j - 5e-20k
Mathematics
Provide an appropriate response.
A surveyor has to determine the area of an irregular piece of land. What is the area? (Hint: Construct lines AC and CE.)
A. 8,715 ft2 B. 11,805 ft2 C. 11,296 ft2 D. insufficient information
Mathematics
Multiply or divide, as indicated. Simplify the answer.
A. - 
B. - 
i
C. 
D. 
i
Mathematics
Use an identity to write the expression as a single trigonometric function or as a single number.
A. cos 37° B. tan 37° C. cot 37° D. sin 37°
Mathematics