Use a calculator to find the approximate value of the expression rounded to two decimal places.cot 0.2731
A. 0.96
B. 0.28
C. 3.57
D. 1.04
Answer: C
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Answer as requested.Suppose that there is perfect positive correlation between the number of hours studied for a test and score on the test. Which of the following statements must be true? More than one statement may be true.A: If we know the number of hours a given student studied, we will be able to perfectly predict their test score.B: If Anne studied twice as long as Manuel, she will score twice as much.C: If Lu Yi studied ten hours more than Andrea, Lu Yi will score ten points more than Andrea. D: All data points lie perfectly on a horizontal line.
A. All statements are true B. A C. B and C D. A and D
Solve the inequality. Write the solution set in interval notation and graph it.a + 10 < 14
A. (-?, 4)
B. (4, ?)
C. [4, ?)
D. (-?, 4]
Solve the problem.The revenue achieved by selling x graphing calculators is figured to be 
The cost of each calculator is 
How many graphing calculators must be sold to make a profit (revenue - cost) of at least $492.80?
A. {x?46 < x < 54} B. {x?44 < x < 56} C. {x?19 < x < 31} D. {x?45 < x < 43}
Multiply and simplify.
? 
A. 
B. 
C. - 
D. - 