Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.
-3
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve the problem by integration.The current i (in A) as a function of the time t (in s) in a certain electric circuit is given by 
Find the total charge that passes a given point in the circuit during the first three seconds.
A. 3.761 C B. 1.254 C C. 11.284 C D. 3.738 C
Mathematics
Simplify. Be sure to rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 3
Mathematics
Plot the complex number in the complex plane.z = 5 - i
A. 
B. 
C. 
D. 
Mathematics
Factor the polynomial by grouping.x2 + 7x + 3x + 21
A. (x - 7)(x - 3) B. (x + 7)(x + 3) C. prime D. (x - 7)(x + 3)
Mathematics