Find the derivative of the function.f(x) = log7 (x9 + 1)
A. 
B. 
C. 
+ 9x8
D. 
Answer: D
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Replace the polar equation with an equivalent Cartesian equation.r2 = 36r cos ? - 6r sin ? - 9
A. (x - 18)2 + (y + 3)2 = 9 B. (x - 18)2 + (y + 3)2 = 324 C. 36x - 6y = 9 D. (x + 36)2 + (y - 6)2 = 9
Solve the problem.Find the point on the plane 
that is nearest the origin.
A. (-2, 8, 2) B. (2, 4, 0) C. (2, 4, -2) D. (4, 4, 0)
Find the quantity indicated.x varies inversely as y2. If x = 4 when y = 10, find x when y = 2.
A. x = 100 B. x = 5 C. x = 80 D. x = 16
Write the statement in symbolic form.Let p: The outside humidity is low. q: The central humidifier is running. r: The air in the house is getting dry.The air in the house is getting dry, if and only if the outside humidity is low and the central humidifier is not running.
A. r ? (p ? q) B. (r ? p) ? ~ q C. (p ? q) ? r D. r ? (p ? ~ q)