Determine whether the situation or equation represents direct or inverse variation.The frequency that you brush your teeth and the length of time that you retain all your teeth
A. Direct
B. Inverse
Answer: A
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Evaluate the validity of the chain of conditionals.Premise: If I pay my bills on time, then my credit will be good.Premise: If my credit is good, then I will become a movie star.Conclusion: If I pay my bills on time, then I will become a movie star.
A. Valid B. Invalid
Simplify. Express your answer with positive exponents. Assume that all variables are nonzero.
A. 
B. 
C. x3
D. x4
Solve the problem.A car rental firm charged $25 per day or portion of a day to rent a car for a period of 1 to 6 days. Days 7 to 9 were then "free," while the charge for days 10 through 15 was again 
per day. Let 
represent the total cost to rent the car for t days, where 
Find the total cost of a rental for 
A. $100 B. $28 C. $75 D. $25
Find the area of the triangle. If necessary, round the answer to two decimal places.
A. 11.41 B. 5.71 C. 12.24 D. 22.82