Write the vector u as a sum of two orthogonal vectors, one of which is the vector projection of u onto v, projvu .u = 
, v = 
A. 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
Answer: C
Mathematics
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Find the exact value. Do not use a calculator.cot 570°
A. 
B. - 
C. - 
D. 
Mathematics
Solve the problem. POLLUTION 
Years since 1980Use the ordered pairs (2, 14.78), (6, 11.82), and (8, 13.58) to find a quadratic function that models the data. Round the values of a, b, and c to two decimal places.
A. y = -2.90x2 + 0.27x + 20.5 B. y = 0.27x2 - 2.90x + 19.50 C. y = 2.9x2 - 0.27x + 19.50 D. y = -2.90x2 + 0.27x + 19.50
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Find fraction notation and simplify. 12.5%
A. 
B. 
C. 
D. 
Mathematics
Evaluate the trigonometric function of the given quadrantal angle. If the value is undefined, write "undefined."tan (630°)
A. -1 B. undefined C. 0 D. 1
Mathematics