Find the gradient field of the function.f(x, y, z) = 
5
A. ?f = 5
4i + 
j + 5
k
B. ?f = 
i + 
j - 5
k
C. ?f = 5
4i + 
j - 5
k
D. ?f = 5
4i + 
j + 5
k
Answer: B
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Evaluate f(x) at the given value of x.f(x) = 
x + 
; x = 3
A. 
B. 
C. 
D. 8
Use a calculator to find the approximate value of the composition. Round answers to four decimal places, if necessary.arctan(tan(2))
A. 2 B. -2 C. 1.1416 D. -1.1416
In the figure below, a person standing at point A notices that the angle of elevation to the top of the antenna is 
. A second person standing 37.0 feet farther from the antenna than the person at A finds the angle of elevation to the top of the antenna to be 
varid="variable_id_field" variablename="impvar_5be330fdcbf44d03a1582d4a0" />. How far is the person at A from the base of the antenna? Round your answer to the nearest feet.
?
?
?
A. 197 ft
B. 194 ft
C. 192 ft
D. 191 ft
E. 195 ft
Use the graph of 
to identify at which of the indicated points the derivative 
changes from negative to positive.
?
A. (-1, 2), (2, 4) B. (4, 1) C. (-1, 2), (2, 4), (5, 6) D. (2, 4) E. (2, 4), (5, 6)