Solve the problem.The current, in amperes, for a piece of wire with an electromotive force of 
, is given by the function 
, where r is the resistance of the wire in ohms. What is the current, rounded to the nearest hundredth of an ampere, if the wire has a resistance of 22 ohms?
A. 3.61 amperes
B. 3.92 amperes
C. 36.82 amperes
D. 3.68 amperes
Answer: D
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Solve.A machinist who had been producing 50 parts per day increased output to 85 parts per day by using a faster machine. How many times faster is the new machine? Express your answer as a mixed number.
A. 1
times faster
B. 2
times faster
C. 2
times faster
D. 1
times faster
Simplify the expression using multiplication.The area of the vertical faces of a rectangular solid with height h and base edges l and b can be expressed as 
Write this formula without parentheses and without multiplication signs.
A. A = 2h + lb B. A = 2hl + b C. A = 2hlb D. A = 2hl + 2hb
Simplify the expression. Assume that all variables are positive.
? 
A. 
B. 
C. 
D. 
Solve the radical equation, and check all proposed solutions.
= 
A. 
B. 
C. 
D. ?