Find the dot product of u and v.
?

?

A. 36
B. 40
C. 44
D. 42
E. 38

Answer: B

Mathematics

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Evaluate the integral using the given substitution., u = cot 7?

A. -  tan2 7? + C
B. -  cot2 7? + C
C.  cot2 ? + C
D.  csc3 7? cot2 7? + C

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Mathematics

Solve the problem.Karen and Ivan traveled at 115 kilometers/hour for 4.7 hours. Their total trip will be 630 miles long. How many miles do they still need to travel? (Round your answer to the nearest whole mile, if necessary.)

A. 559 mi B. 90 mi C. 295 mi D. 474 mi

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Mathematics

Evaluate the expression.-1/2

A.
B. not a real number
C.
D.

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Mathematics

Determine the size of matrix A and tell whether it is a square matrix, row matrix, column matrix, or none of these.A = 

A. 20; row matrix B. 5 × 4; none of these C. 4 × 5; none of these D. 4 × 4; square matrix

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Mathematics