Perform the indicated operation.The electric current i (in A) in a circuit with a battery of voltage E, resistance R , a current i, and an inductance L, is 
, where t is the time after the circuit is closed. Find i for R = 1.321 ?, E = 5.923 V, L = 3.289 H, and t = 0.00500 s to three significant digits.
A. 8.98
B. -0.00901
C. 8.96
D. 0.00900
Answer: D
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Find the area of the specified region.Inside the circle r = 2 cos ? + 7 sin ?
A. 7?
B. 
C. 
+ 7
D. 
Supply the missing numbers. Round any decimal to the nearest thousandth and percent to the nearest tenth of a percent if necessary.fractiondecimalpercent
A. 0.211; 211% B. 0.091; 9.1% C. 0.211; 21.1% D. 0.091; 0.91%
Rewrite the equation in terms of base e. Express the answer in terms of a natural logarithm, and then round to three decimal places.y = 2(7)x
A. y = 2e7x, y = 22.7181.946x B. y = (ln 2)ex ln 7, y = 0.693e1.946x C. y = 7ex ln 2, y = 7e0.693x D. y = 2ex ln 7, y = 2e1.946x
Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
= 
A. 40 B. 4 C. 1.00 D. 1.0