Answer:
3,964 ft
Step-by-step explanation:
555 / tan 8° = 555/0.14 = 3,964 ft
10x20x2=$400
All you have to do is find the area of the floor(10x20=200),then you just multiple the area by the cost(200x$2=$400),and that is how you find the cost.
Total number of marbles = 5 + 8 + 7 = 20
Total number of non-red marbles = 5 + 7 = 12
P(not red) = 12/20 = 3/5
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Answer: 3/5