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: real numbers z ? 0; level curves: parabolas 
B. Domain: all points in the xy-plane excluding x = 0; range: all real numbers; level curves: parabolas 
C. Domain: all points in the xy-plane excluding x = 0; range: real numbers z ? 0; level curves: parabolas 
D. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas 
Answer: B
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Solve the problem.The function defined by 
gives the distance in feet that a car going approximately 
will skid in t seconds. Find the time it would take for the car to skid 
. Round to the nearest tenth.
A. 10.1 sec B. 10.3 sec C. 9.9 sec D. 8.9 sec
Write the given terms as like radicals, if possible. If any variables exist, assume that they are positive.
, 
A. 9
, xy
B. 3
, xy
C. 9
, xy
D. Not possible
Find the unknown diameter or radius in the figure.
A. 148 in. B. 222 in. C. 37 in. D. 25 in.
Write the new function.The linear function f(x) = 473x + 3420 provides an approximation of the annual cost (in dollars) of health insurance for a family of three, where 
represents 1993, 
represents 1994, and so on. Write a new function, g(x), that yields the same f(x)-values when the exact year number is entered.
A. g(x) = 473(1992 - x) + 3420 B. g(x) = 473(1993 - x) + 3420 C. g(x) = 473(x - 1993) + 3420 D. g(x) = 473(x - 1992) + 3420