Solve the problem.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. 15.0 L
B. 24 L
C. 20.0 L
D. 30 L
Answer: A
Mathematics
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Find the product or quotient, using trigonometric form. Write the answer in the form a + bi.
A. 
- 
i
B. 
+ 
i
C. 
+ 
i
D. 
+ 
i
Mathematics
Use the table to find the compound interest. Round to the nearest cent.
$15,000 at 1% compounded annually for 13 years
A. $2071.35 B. $1950.00 C. $1902.38 D. $1800.00
Mathematics
Let x represent the number. Write the English phrase as an algebraic expression.The sum of 142 and a number
A. 142x B. 142 C. 142 + x D. 142 - x
Mathematics
Fill in the blank with one of the words or phrases listed below. 
An angle whose measure is between 0° and 90° is called a(n) 
angle.
A. obtuse B. acute C. angle D. adjacent
Mathematics