Find the radius of the given circle.
A. 116.18 ft
B. 18.5 ft
C. 37 ft
D. 4298.66 ft
Answer: C
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Use the vertical line test to determine if y is a function of x.
A. Function B. Not a function
Solve.The thickness of an airport runway's pavement is determined by the weight of the planes using it. The relationship between runway thickness x, in inches, and gross airplane weight y, in thousands of pounds, can be modeled by the equation 
If a loaded cargo plane weighs 300,000 pounds, what must the minimum thickness of the runway be? Round any partial inch up to the nearest whole inch.
A. 11 in. B. 39 in. C. 40 in. D. 12 in.
Use the graph of 
to guess at the limit 
, if it exists.
a. –2
b. –1
c. Does not exist
d. –3
Find all cube roots of the complex number. Leave answers in trigonometric form.-6
- 6i
A. 
cis 70°, 
cis 190°, 
cis 310°
B. 
cis 70°, 
cis 190°, 
cis 310°
C. 
cis 70°, 
cis 190°, 
cis 310°
D. 
cis 80°, 
cis 200°, 
cis 320°