Give the interval where the function increases or decreases, as requested.f(x) = -3x2 + 2decreases
A. [2/3, ?)
B. (0, ?)
C. (0, -?)
D. (-?, 2/3)
Answer: B
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Use a calculator with a 
key to solve the problem.The function f(x) = 90e-0.2x + 10 models the percentage of information, f(x), that a particular person remembers x weeks after learning the information. a) Substitute 0 for x and, without using a calculator, find the percentage of information remembered at the moment it is first learned. b) Find the percentage of information that is remembered after 4 weeks. Round to the nearest thousandth of a percent.
A. a) 10%; b) 10.449% B. a) 50%; b) 210.299% C. a) 90%; b) 40.440% D. a) 100%; b) 50.440%
Divide.3.18 ÷ 3
A. 20.6 B. 2.06 C. 1.06 D. 10.6
The graph of a function is given. Choose the answer that represents the graph of its derivative.
A. 
B. 
C. 
D. 
Solve the equation by factoring.2x2 - 8x = 0
A. 
B. 
C. {0}
D. 