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 749. Find a linear equation which expresses score, S, in terms of time, t. Use this equation to predict an average score for persons taking a 41-hour review course. Round your answer to the tenths place.
A. 669.5
B. 655.5
C. 659.7
D. 648.2
Answer: B
Mathematics
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Find the derivative of the function by first expanding or simplifying the expression. f(x) = (3x - 2)(4x3 - x2 + 1)
A. f'(x) = 48x3 - 11x2 + 33x + 3 B. f'(x) = 48x3 - 33x2 + 4x + 3 C. f'(x) = 36x3 + 33x2 - 11x + 3 D. f'(x) = 12x3 + 11x2 - 33x + 3
Mathematics
Solve the equation on the interval 0 ? ? < 2?.cos2 ? - 1 = 0
A. 
B. 
C. {0}
D. {0, ?}
Mathematics
Find the LCM of the set of numbers.25, 40
A. 65 B. 40 C. 1,000 D. 200
Mathematics
Solve the equation. Round to the nearest thousandth.e9x e4x = e3
A. {1.321} B. {-0.859} C. {0.231} D. {0.315}
Mathematics