Find the amount or rate of discount and the sale price. Round money amounts to the nearest cent.Original price: $63.70 Rate of discount: 25%
A. $16.56, $47.14
B. $15.93, $47.77
C. $7.97, $55.73
D. $15.29, $48.41
Answer: B
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Evaluate the expression for the given replacement values.x ÷ y for x = 312, y = 0
A. 
B. 312
C. 0
D. undefined
Reduce the rational expression to lowest terms.
A. 
B. 
C. - 
D. 
Simplify.74 - 4 ? 3 ? 2
A. 124 B. 50 C. 420 D. 65
Solve the problem.The dosage for Carboplatin Chemotherapy drugs depends on several parameters of the drug as well as the age, weight, and sex of the patient. For a male patient, the formulas giving the dosage for a certain drug are: D = A(c + 25)and c = 
,where A and x depend on which drug is used, D is the dosage in milligrams (mg), c is called the creatine clearance, y is the patient's age in years, and w is the patient's weight in kg. For a 50 year old man, find an expression for 
in terms of A and x.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
+ 25A