Rob is setting up a model train track that is 3 and 3 over 8 feet long. no telephone pole is needed at the start of the track. however, along the track, he places a telephone pole every 3 over 8 foot apart. how many telephone poles does he need? (input number values only) a n s w e r p l e a s limited !

First convert the mixed number 3 & 3/8 to an improper fraction

The whole part is w = 3
The numerator is n = 3
The denominator is d = 8

So we'll have the improper fraction (d*w+n)/d = (8*3+3)/8 = (24+3)/8 = 27/8

In other words, the mixed number 3 & 3/8 is equivalent to the improper fraction 27/8

The whole track is 27/8 feet long. Divide this entire length over the fraction 3/8 to figure out how many poles are needed

Number of poles needed = (length of entire track)/(distance between poles)
Number of poles needed = (27/8) divided by (3/8)
Number of poles needed = (27/8) times (8/3)
Number of poles needed = (27*8)/(8*3)
Number of poles needed = 27/3
Number of poles needed = 9

Therefore the final answer is 9

4+21-18
25-18
7 is the correct answer