Solve the problem.Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a 70-hour review course average a score of 780. Find a linear function, S(t), which fits this data, and which expresses score as a function of time. Use this function to predict an average score for persons taking a 53-hour review course. Round your answer to the tenths place.
A. 726.0
B. 704.7
C. 712.0
D. 716.2
Answer: C
Mathematics
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Solve the problem.Assuming C is a simple closed path , what is special about the integral 
? Give reasons for your answer.
What will be an ideal response?
Mathematics
Evaluate the integral by changing the order of integration in an appropriate way.
A. 4 ln 126 B. 2 ln 126 C. 2 ln 626 D. 4 ln 626
Mathematics
Simplify. Write the expression as a single logarithm with a coefficient of 1.3 ln (w2) - ln (7w9)
A. ln (w6 - 7w9)
B. ln (3w2 - 7w9)
C. ln 
D. ln 
Mathematics
Solve the problem. Express your answer as an integer or simplified fraction.- 
(x - 18) - 
(x - 8) = x - 7
A. 
B. 
C. 
D. 
Mathematics