Solve the problem.The temperature of water in a certain lake on a day in October can be determined by using the model 
where x is the number of feet down from the surface of the lake and y is the Celsius temperature of the water at that depth. Based on this model, how deep in the lake is the water 13 degrees? (Round to the nearest foot.)
A. 60 ft
B. 4 ft
C. 23 ft
D. 53 ft
Answer: B
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Solve the problem. Assume all numbers are approximate unless otherwise stated or the number has been determined by a definition or counting process.If you are told that the height of a trapezoid is 975 mm, that the length of one of its parallel sides is 4423 mm, and that the area of the trapezoid is 3,551,000 mm2, then you could estimate the length of the other parallel side (in mm) by performing the calculation 
. Perform this calculation and report the length found.
A. 7282 mm B. 7280 mm C. 7000 mm D. 7380 mm
Solve the problem.Which of the lines in the picture are lines of symmetry of the given figure?
A. r, s and t B. q, r, s and t C. q and s D. Only s
Solve the problem.The population of a small town in 1988 was 12,000 people. Due to decline in industrial growth the population has since been decreasing at a rate of 3% every year. What was the population of this town in 1998?
A. 7978 people B. 7185 people C. 9805 people D. 8849 people
Use the quadratic formula or graphing methods to solve the inequality.4x2 > 4x + 4
A. x > 
? 1.618
B. 
? -0.618 < x < 
? 1.618
C. x < 
? -0.618 or x > 
? 1.618
D. x < 
? -0.618