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