It is 100000.
100000
10^(-5) = 0.00001 = 1/100000
10/50, 100/500, 1000/5000, 10000/50000, 100000/500000 and 11/55 are 6 examples.
One of them.
3.75*105 = 3.75*100000 = 375,000
One fifth plus one fifth is two fifths (2/5).
one fifth
100000 inches . * * * * * What? The answer depends on "one and one half" of what. But whatever that is, the answer is not likely to be 100000 inches!
100000 centimetres is equal to 100000 / 100 = 1000 metres, and therefore, one kilometre.
one and one-fifth
One fifth