Simplify.
+ 
A. 
B. 
C. 
D. - 
Answer: B
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Simplify.
A. 180 B. 20 C. 19 D. does not exist as a real number
Solve for y in terms of x.6 log 2 y - log 2 x = 2 log 2 7 + log 2 a
A. y = x + 14 + a
B. y = 
1/6
C. y = 
1/6
D. y = 
1/6
Solve.(log3 x)2 + 2log3 x - 8 = 0
A. 
B. 
C. {9}
D. {4}
Solve the problem.The number of households in Country X with personal computers (PCs) and the total number of households in Country X are shown in the table below for various years. Households with Personal Computers (Millions)YearHouseholds with PCs Total Households199328.2195.5199730.4598.0199949.80100.5200359.82102.2200567.42114.0Let C be the number (in millions) of households in Country X with PCs and H be the total number (in millions) of households in Country X, both at t years since 1990. (i) Find equations for C(and H to model the data.(ii) Use substitution or elimination to predict when all households in Country X will have PCs.(iii) Use the models to predict the percentage of households that will have PCs in 2017.
A. (i) C = 4.81t + 16.01; H = 0.99t + 68.42; (ii) In about 2029, all households in Country X will have PCs. (iii) In 2017, about 81.1% of households will have PCs. B. (i) C = 3.50t + 14.22; H = 1.31t + 89.70; (ii) In about 2024, all households in Country X will have PCs. (iii) In 2017, about 86.9% of households will have PCs. C. (i) C = 3.67t + 9.63; H = 4.30t + 52.37; (ii) In about 2019, all households in Country X will have PCs. (iii) In 2017, about 83.1% of households will have PCs. D. (i) C = 5.53t + 12.86; H = 2.53t + 79.41; (ii) In about 2030, all households in Country X will have PCs. (iii) In 2017, about 90.6% of households will have PCs.