9.
Start from 110 feet away, a person on a bicycle rides towards a checkpoint and then passes it. The rider is travelling at a constant rate of 30 feet per second. The distance between the bicycle and the checkpoint is given by the equation d = |110 – 30t|. At what times is the bike 40 feet away from the checkpoint? (1 point)
10.
Suppose R = {1, 3, 5, 7, 9, 11, 13, 15, 17} and D = {3, 6, 9, 12, 15, 18, 21, 24, 27}. What is R ∩ D? (1 point)

Question

9.  
Start from 110 feet away, a person on a bicycle rides towards a checkpoint and then passes it. The rider is travelling at a constant rate of 30 feet per second. The distance between the bicycle and the checkpoint is given by the equation d = |110 – 30t|. At what times is the bike 40 feet away from the checkpoint?   (1 point)
10.  
Suppose R = {1, 3, 5, 7, 9, 11, 13, 15, 17} and D = {3, 6, 9, 12, 15, 18, 21, 24, 27}. What is R ∩ D?  (1 point)

aaronq · Answer

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