Solve.y varies inversely with x. If y = 4.8 when x = 0.6 , find y when x = 8.
A. y = 3.6
B. y = 23.04
C. y = 0.36
D. y = 0.06
Answer: C
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Express the number in scientific notation..000556
A. 5.56 x 10-3 B. 5.56 x 10-5 C. 5.56 x 104 D. 5.56 x 10-4
Solve the system as matrix equations using inverses.A company produces three models of MP3 players, models A, B, and C. Each model A machine requires 
of electronics work, 2.8 hours of assembly time, and 4.4 hours of quality assurance time. Each model B machine requires 
of electronics work, 
of assembly time, and 
of quality assurance
time. Each model C machine requires 
of electronics work, 
of assembly time, and 
of quality assurance time. There are 
available each week for electronics, 
for assembly, and 
for quality assurance. How many of each model should be produced each week if all available time must be used?
A. Model A: 28
Model B: 22
Model C: 45
B. Model A: 31
Model B: 20
Model C: 44
C. Model A: 30
Model B: 15
Model C: 50
D. Model A: 30
Model B: 20
Model C: 45
Find any excluded values.
A. ±2, -9 B. no excluded values C. ±2 D. 0, -4
Solve the exponential equation.47x = 4
A. 
B. 1
C. 4
D. 7