3.071524 (rounded)
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105 is a power. 10 is the base and the exponent is 5.
3 and 2 over 7 = ( 3*7 + 2 )/ 7 = 23/7 7 and 1 over 15 = ( 7*15 + 1 ) / 15 = 106/15 The least common multiple of 7 and 15 is 105 So, 23/7 + 106/15 = 23*15 / 105 + 106*7 / 105 = 345 / 105 + 742 / 105 = 1087 / 105 = (1050 + 37 ) / 105 = 10 and 37 over 105
x to the nth power means n lots of x's, all multiplied together. In this case, 10 to the 5th power, or 105 would mean 10x10x10x10x10 = 100,000 20 times this is 20x100,000=2,000,000 Thus, 20 times 10 to the 5th power is 2 million.
It is: 105 = 100,000
105 = 100,000