Solve the problem.A drug company establishes that the most effective dose of a new drug relates to body weight as shown below. Let body weight be the independent variable and drug dosage be the dependent variable. Use a graphing utility to draw a scatter diagram and to find the line of best fit. What is the most effective dosage for a person weighing 110 lbs? 
A. 13.5 mg
B. 13.07 mg
C. 29 mg
D. 13 mg
Answer: D
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Factor out the negative of the greatest common factor.-2t2 - 4t - 8
A. -2t(t2 + 2t + 4) B. -2(t2 + 4t + 8) C. -2(t2 + 2t + 4) D. -2(t2 + 2t + 6)
Mark as true any statement that is always true. Mark as false any statement that is never true or that is not necessarily true. Be able to justify your answers.
1. A sphere is a polyhedron. 2. The bases of a right regular prism may be congruent, parallel hexagons. 3. The lateral faces of a right square pyramid are isosceles triangles. 4. If there are 1.057 quarts in one liter and four quarts in one gallon, then there are 4.228 liters in one gallon.
Write the rational expression in lowest terms.
A. 
B. 1
C. - 
D. -1
Perform the indicated operations. Write the result using a radical. Assume that all variables represent positive values.
A. 
B. 
C. 
D. 