Find all solutions of the equation in the interval [0, 2?).2 cos2 ? - 3 cos ? + 1 = 0
A. 
B. 
C. 
D. 
Answer: B
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Compute r, the linear coefficient of correlation, for the given data.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
A. -0.224 B. -0.678 C. 0.678 D. 0.224
Provide an appropriate response.To find the face value required by the coinsurance clause for full compensation is:
A. the amount of insurance carried divided by 80% B. 80% times the face value C. 80% times the replacement value D. 80% times the actual cost
Solve the variation problem.The distance it takes to stop a car varies directly as the square of the speed of the car. If it takes 112 feet for a car traveling at 40 miles per hour to stop, what distance is required for a speed of 
per hour?
A. 216 feet B. 264.3 feet C. 252 feet D. 252.34 feet
Add.-57 + 0
A. 0 B. -57 C. -570 D. 57