A point in rectangular coordinates is given. Convert the point to polar coordinates, r > 0.
?
?
A. Polar coordinates: 
B. Polar coordinates: 
C. Polar coordinates: 
D. Polar coordinates: 
E. Polar coordinates: 
Answer: A
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Solve problems using a calculator.A local water district purchased its annual supply of water from three different sources. The number of acre-feet purchased and the cost per acre-foot for each source are shown in the following table. Calculate the average cost of water per acre-foot. (Round to the nearest dollar, if necessary.)Source Number of Acre-Feet Cost per Acre-FootReservoir X 1109 $649Well Water 2740 $208State Water 4775 $2896
A. $1748.62 per acre-foot B. $1753.02 per acre-foot C. $1752.98 per acre-foot D. $1747.14 per acre-foot
Perform the indicated operation and write the answer in lowest terms. 
- 
A. 
B. 
C. 
D. 
Use Bayes' rule to find the indicated probability.Two shipments of components were received by a factory and stored in two separate bins. Shipment I has 2% of its contents defective, while shipment II has 5% of its contents defective. If it is equally likely an employee will go to either bin and select a component randomly, what is the probability that a defective component came from shipment II?
A. 0.714 B. 0.222 C. 0.5 D. 0.2
Provide an appropriate response.Sheila notes that if a = 20 and b = 20, then a - b = b - a = 0. She concludes that for any real numbers a and b, a - b = b - a . Do you agree with her reasoning? If not, why not?
What will be an ideal response?