Decide whether the statement is true or false.The equation of a circle centered at the origin with radius 4 is x2 + y2 = 4.
A. True
B. False
Answer: B
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Simplify the complex number to its rectangular form.
+ 
A. 2
- 4
j
B. 2
+ 4
j
C. -2
D. -2
j
Solve the problem.The following data represents the normal monthly precipitation for a certain city in California. 
Draw a scatter diagram of the data for one period. Find a sinusoidal function of the form 
that fits the data. Draw the sinusoidal function on the scatter diagram. Use a graphing utility to find the sinusoidal function of best fit. Draw the sinusoidal function of best fit on the scatter diagram.
What will be an ideal response?
Find area of figure. Round to the nearest hundredth if necessary.
(Use 3.1 4 for ? .)
A. 520.065 yd2 B. Not enough data C. 453.7325 yd2 D. 428.22 yd2
Evaluate the root function at the given x-value. Round to the nearest hundredth when appropriate.f(x) = 
, x = 9
A. Undefined B. 2.39 C. -2.05 D. -2.39