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 feet
B. 53 feet
C. 4 feet
D. 23 feet
Answer: C
Mathematics
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Use reference angles to find the exact value of the expression. Do not use a calculator.csc 1020°
A. - 
B. - 
C. - 
D. - 
Mathematics
Perform the subtraction. 
A. 630 B. 468 C. 568 D. 566
Mathematics
Solve the problem.Sue has taken four exams so far in her History course. His scores are 98.9, 78.2, 93, and 87.5. What is the average of these scores?
A. 89.4 B. 91.6 C. 89.55 D. 88
Mathematics
Find the absolute minimum value(s) of y = 2
? 20x + 9 on the interval [0, 6].
What will be an ideal response?
Mathematics