Perform the requested evaluation.Given f(x) = -
, find f(4).
A. -2
B. -6
C. 2
D. 6
Answer: A
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Write the sum using summation notation.0 + 2 + 6 + 12 + 20
A. 
B. 
C. 
D. 
Establish the identity.sec 4 x - tan 4 x = sec 2 x + tan 2 x
What will be an ideal response?
Solve the problem.An oil spill of 3971 cubic centimeters is spilled onto a pond and spreads out in a circular shape having a diameter of 766 centimeters. Approximate the thickness of the oil film to four decimal places.
A. 0.0086 cm B. 3.3003 cm C. 116.0506 cm D. 1.6501 cm
A company introduces a new product on a trial run in a city. They advertised the product on television and found the percentage P of people who bought the product after t ads had run satisfied the function 
(a) What percentage buys the product after the ad has been been run 1 time, 5 times, 20 times? (b) Find the rate of change P?(t ) (c) Sketch a graph of the function.