Solve the problem.The current I, in amperes, flowing through a particular ac (alternating current) circuit at time t seconds is I = 220 sin 
What is the period of the current?
A. 
second
B. 
second
C. 
second
D. 70? seconds
Answer: A
Mathematics
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Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
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Evaluate the rational expression.
when x = 1, y = -4
A. - 
B. 
C. - 
D. 
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Graph the polynomial function.
a. 
b. 
c. 
d. 
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Find the intercepts of the function f(x).f(x) = 3x4 - 6x3 + 4x2 - 2x + 1
A. x-intercepts: -1, 1; y-intercept: 1 B. x-intercepts: none; y-intercept: 1 C. x-intercept: 1; y-intercept: 1 D. x-intercept: -1; y-intercept: 1
Mathematics