Two formulas that approximate the dosage of a drug prescribed for children are: Young's Rule: C = 
and Cowling's Rule: C = 
.In each formula, A = the child's age in years, D = an adult dosage, and C = the proper child's dosage. The formulas apply for ages 2 through 13. Use these formulas to solve the problem.Use Cowling's Rule to find the difference in a child's dosage for a 10-year-old child and a 6-year old child. Express the answer as a single rational (or fractional) expression in terms of D.
A. 
D
B. 
D
C. 
D
D. 4D
Answer: C
Mathematics
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Divide and simplify.
A. 20x4 B. 3x4 C. 3x3 D. 3x8
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Leo Moser studied the effect that two face-to-face panes of glass have on light reflected through the panes. If a ray is not reflected, it has just one path through the glass. If it has one reflection, it can be reflected two ways. For two reflections, it can be reflected three ways. How many possible paths are there for three reflections. ? __________ paths
Fill in the blank(s) with the appropriate word(s).
Mathematics
Find the asymptotes of the hyperbola.7x2 - y2 - 56x + 14y - 49 = 0
A. y - 7 = ± 
(x - 4)
B. y - 7 = ± 7(x - 4)
C. y - 4 = ± 
(x - 7)
D. y - 7 = ± 
(x - 4)
Mathematics
Graph the hyperbola.y = ±
A. 
B. 
C. 
D. 
Mathematics