Estimate the sum or difference by rounding.

A. 2865
B. 2870
C. 3100
D. 2900

Answer: D

Mathematics

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Solve the problem.If a resistor and inductor are connected in series to a battery of emf ?, the current in the circuit is given by  where ? is the time constant of the circuit, R is the resistance, and t is the time since the circuit was closed. Find the expression for dI/dt.

A. - et/?
B. e-t/?
C. e-t/?
D.

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Evaluate.log416

A. -2
B.
C. 4 ? ln2
D. 2

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Solve and graph.|7k + 8| > -4

A. ?, or (-?, ?)

B. , or 

C. , or 

D. , or  ? 

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Divide.42 ÷ 6

A. -7 B. 7 C. 36 D. -36

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