Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = ex+y
A. Domain: all points in the first quadrant of the xy-plane; range: real numbers z > 0; level curves: lines x + y = c
B. Domain: all points in the first quadrant of the xy-plane; range: all real numbers; level curves: lines x + y = c
C. Domain: all points in the xy-plane; range: all real numbers; level curves: lines x + y = c
D. Domain: all points in the xy-plane; range: real numbers z > 0; level curves: lines x + y = c
Answer: D
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Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 7
B. 
C. 7
D. 
Find the range of the polynomial function. f(x) = x3 - 7x2 - 7x + 5
A. (-?, 5] B. [5, ?) C. [0, ?) D. (-?, ?)
Find the intervals on which the given function is increasing and the intervals on which it is decreasing.
A. Increasing on 
and decreasing on 
B. Increasing on 
and decreasing on 
C. Increasing on 
and decreasing on 
D. Increasing on 
and decreasing on 
Evaluate by using scientific notation and the laws of exponents. Leave you answer in scientific notation.(180,000,000)(0.00002)(3000)(0.002)
A. 2.16 × 103 B. 2.16 × 104 C. 2.16 × 106 D. 2.16 × 105