Multiply.(-1)(-2.81)
A. 1
B. -2.81
C. 2.81
D. -1
Answer: C
Mathematics
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Solve the problem.How many seconds after the switch in an RL circuit is closed will it take the current i to reach 
of its steady state value? Express answer in terms of R and L and round coefficient to the nearest hundredth.
A. 1.39 L/R seconds B. 0.29 L/R seconds C. 0.49 L/R seconds D. 1.59 L/R seconds
Mathematics
Use a sum-to-product identity to rewrite the expression.cos 
- cos 
A. 2
B. - 2
C. 2
D. -2
Mathematics
Evaluate.
+ 
? 
A. 
B. 
C. 
D. 
Mathematics
Solve.Find the equilibrium point for the given supply and demand functions. Here y represents price and x represents quantity. y = 3230 - 90x (demand) y = 100x (supply)
A. 10, $1700 B. 32, $350 C. 10, $2330 D. 17, $1700
Mathematics