Find the area enclosed by the given curves.Find the area of the region between the curve y = 4x/(1 + x2) and the interval 
of the x-axis.
A. 4 ln 10
B. 0
C. 4 e10
D. ln 10
Answer: A
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Solve the problem.The voltage V in a certain electric circuit as a function of the time t (in s) is given by 
How fast is the voltage changing when t = 2.0 ms?
A. 1.1 V/s B. 410 V/s C. 370 V/s D. 360 V/s
Name the property used to go from step to step each time that (why?) occurs.8(x + 5) + 5x= (8x + 40) + 5x (why?)= (40 + 8x) + 5x (why?)= 40 + (8x + 5x) (why?)= 40 + (8 + 5)x (why?)= 40 + 13x = 13x + 40 (why?)
What will be an ideal response?
Solve the problem.Anne and Nancy use a metal alloy that is 20% copper to make jewelry. How many ounces of a 14% alloy and a 24% alloy must be mixed to form 100 ounces of the desired alloy?
A. 30 at 14% and 70 at 24% B. 60 at 14% and 40 at 24% C. 40 at 14% and 60 at 24% D. 70 at 14% and 30 at 24%
Find all points where the function is discontinuous.
A. x = -2, x = 0, x = 2 B. x = -2, x = 0 C. x = 2 D. x = 0, x = 2