Find all the spanning trees in the graph.
What will be an ideal response?
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Perform the indicated operation. Simplify your answers. 
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Solve the problem.Between 7:00 AM and 8:00 AM, trains arrive at a subway station at a rate of 5 trains per hour 
per minute). The following formula from statistics can be used to determine the probability that a train will arrive within t minutes of 7:00 AM. F(t) = 1 - e-0.08tDetermine how many minutes are needed for the probability to reach 90%.
A. 13.58 min B. 8.90 min C. 28.78 min D. 1.14 min
Find 
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Solve.A person burns 8.4 calories per minute while walking. One must burn about 3500 calories in order to lose 1 lb. How many pounds would the person lose by walking for 9 hours? Round your answer to the nearest hundredth.
A. 0.02 lb B. 0.91 lb C. 12.96 lb D. 1.30 lb