Find the perimeter.
A. 22 km
B. 24 km
C. 31 km
D. 23 km
Answer: C
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Solve the problem.In a transformer, an electric current in one coil of wire induces a current in a second coil. For a transformer, 
= 
where i is the current and t is the number of windings in each coil. In a neon sign amplifier, i1 = 1.6 A and the turns ratio 
= 150. Find i2 rounded to four decimal places, if necessary.
A. 94 A B. 240 A C. 0.0107 A D. 1.0667 A
Solve the problem.Chandra has 3 liters of a 21% solution of sodium hydroxide in a container. What is the amount and concentration of sodium hydroxide solution she must add to this in order to end up with 7 liters of 13% solution?
A. 4 L of 10% solution B. 4 L of 8% solution C. 4 L of 5% solution D. 4 L of 7% solution
Evaluate the expression without using a calculator. (Assume the variable represents a positive number.)
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Evaluate the expression.
-2/3
A. 
B. - 
C. 
D. 