Solve the problem.Find a field G = P(x, y)i + Q(x, y)j in the xy-plane with the property that at any point (a, b) ? (0, 0), G is a unit vector pointing away from the origin.
A. xi + yj
B. 
C. - 
D. 
Answer: B
Mathematics
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Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = 6t
A. 
B. 
C. 6t
D. 
Mathematics
Find the exact value of the expression.cot (-1215°)
A. -1
B. 
C. 
D. 1
Mathematics
Solve the problem.When sitting atop a tree and looking down at his pal Joey, the angle of depression of Mack's line of sight is 59°10'. If Joey is known to be standing 38 feet from the base of the tree, how tall is the tree (to the nearest foot)?
A. 70 ft B. 64 ft C. 66 ft D. 68 ft
Mathematics
Solve.
= 7
A. -24 B. 12 C. 48 D. 24
Mathematics