Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.The radiator in a certain make of car needs to contain 
of 40% antifreeze. The radiator now contains 
of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?
A. 25 L
B. 20 L
C. 12.5 L
D. 16.7 L
Answer: C
Mathematics
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Perform the indicated operation by hand.30.73 - 25
A. 5.83 B. 5.73 C. -5.73 D. 55.73
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Graph the inequality on a number line. Then write the solution in interval notation.-1 ? x < 3
A. (-1, 3)
B. (-1, 3]
C. [-1, 3]
D. [-1, 3)
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Write a third-degree polynomial equation with real coefficients and the roots 7 - i, -2. ?
A. 
B. 
C. 
D. 
E. none of these
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