Find an equivalent expression with the given denominator.
= 
A. 
B. 
C. 
D. 
Answer: D
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. 4.007 C B. 1.002 C C. 16.029 C D. 3.989 C
Mathematics
Find the sum.-73 + (-41)
A. 32 B. -114 C. -116 D. 114
Mathematics
Without actually converting, choose the most reasonable answer.The weight of a vitamin is about __________ .
A. 200 kg B. 20 kg C. 200 g D. 2 kg
Mathematics
Factor the trinomial.x2 - x - 90
A. (x + 1)(x - 19) B. (x + 10)(x - 9) C. (x + 9)(x - 10) D. (x - 10)(x + 10)
Mathematics