Determine if the argument is valid or a fallacy. Give a reason to justify answer.If it is cold, then you need a coat.You do not need a coat. It is not cold.
A. Fallacy by fallacy of the converse
B. Valid by modus tollens
C. Valid by reasoning of transitivity
D. Fallacy by fallacy of the inverse
Answer: B
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Simplify.(7-1 + 9-1)0
A. -2
B. - 
C. 0
D. 1
Sketch the graph of the equation. If the graph is a parabola, find its vertex. If the graph is a circle, find its center and radius.x = 4y2
A. vertex (4, 0)
B. vertex (0, 0)
C. vertex (0, 0)
D. vertex (0, 0)
Solve the problem.Find the expected number of girls in a family of 7.
A. 4 B. 3.25 C. 3 D. 3.5
Solve the problem.The intensity of the reaction to a certain drug, in appropriate units, is given by 
where t is time (in hours) after the drug is administered. Find the average intensity during the 6th hour.
A. -0.8e-0.2 - 775e-0.24 B. 750e-0.2 - 775e-0.24 C. 775e-0.24 - 800e-0.28 D. 750e-0.2 + 625e-0.24