Use a table of numerical values of f (x, y) for (x, y) near the origin to make a conjecture about the value of the limit of f(x, y) as (x,y) --> (0, 0).
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a. -7
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Find the absolute value.|61|
A. -61
B. 61
C. 
D. 0
Solve the problem.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 160 seconds are required to make a 
enlargement, find the time required for a 
enlargement.
A. 504 sec B. 448 sec C. 392 sec D. 560 sec
Find the length of the unknown side of a right triangle with legs a and b and hypotenuse c. Round to the nearest thousandth, if necessary.a = 4, b = 5
A. c = 20 B. c = 9 C. c = 6.403 D. c = 4.243
Find all cube roots of the complex number. Leave answers in trigonometric form.125(cos 255° + i sin 255°)
A. 5 cis 175°, 5 cis 235°, 5 cis 115° B. 5 cis 85°, 5 cis 145°, 5 cis 25° C. 5 cis 85°, 5 cis 205°, 5 cis 205° D. 5 cis 85°, 5 cis 205°, 5 cis 325°