Solve. Give your answer as a mixed number if appropriate.
= 
A. 138
B. 21
C. 28
D. 2
Answer: B
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Solve the problem.A car is traveling at 42 mph. If its tires have a diameter of 28 inches, how fast are the car's tires turning? Express the answer in revolutions per minute. If necessary, round to two decimal places.
A. 1008.4 rpm B. 488.2 rpm C. 504.2 rpm D. 3168 rpm
Simplify.(x6y4)(x2y5)
A. x11y10 B. x8y9 C. x8y10 D. x12y10
Solve the problem.The distance formula states that d = rt. If a car drives 50 miles, the function r = 
is a rational function. Find the asymptotes of this function.
What will be an ideal response?
Solve the problem.A drugstore sells two types, A and B, of humidifiers. Each humidifier of type A and type B costs $15 and $25, respectively. The store wants at least 9 humidifiers in stock and does not want its investment in the humidifiers to exceed $1500. Graph the possible inventory of the humidifiers and find the vertices. 
A. 
B. 
C. 
D. 