Solve the problem.ABC phone company charges $21 per month plus 3¢ per minute of phone calls. XYZ phone company charges $9 per month plus 5¢ per minute of phone calls. How many minutes of phone calls in a month make XYZ phone company the better deal?

A. More than 600 minutes
B. More than 60 minutes
C. Less than 600 minutes
D. Less than 60 minutes


Answer: C

Mathematics

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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 

A. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas 
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: parabolas 
C. Domain: all points in the xy-plane except y = 0; range: real numbers z ? 0 ; level curves: parabolas 
D. Domain: all points in the xy-plane except y = 0; range: all real numbers; level curves: parabolas 

Mathematics

Solve the problem.How long will it take for $3600 to grow to $47,900 at an interest rate of 8.2% if the interest is compounded quarterly? Round the number of years to the nearest hundredth.

A. 127.54 yr B. 31.89 yr C. 32.84 yr D. 163.92 yr

Mathematics

Solve the problem.A truck rental company charges $39, plus $0.13 per mile to rent a moving truck for a day. If x represents the number of miles driven and f(x) represents the total cost to rent the truck for a day, write a linear function that models the situation.

A. f(x) = 0.13x + 39x B. f(x) = 0.13x + 39 C. f(x) = 39x + 0.13 D. f(x) = 0.13x - 39

Mathematics

Determine whether the statement is true or false.The function f(x) =  has an oblique asymptote.

A. True B. False

Mathematics