Do you mean,
0.0875 ?
8.75 X 10 -2
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87.5 = (8 x 10) + (7 x 1) + (5/10)
0.1 x 10 = 1
When we raise a number to a negative exponent, it is the same as taking the reciprocal of the number raised to the positive exponent. So, 10 to the power of -1 is the same as 1 divided by 10 to the power of 1. Since 10 to the power of 1 is 10, the reciprocal of 10 is 1 divided by 10, which equals 0.1 or 1/10.
880 Because you put a line in the place that is between the 7 & 5 and anything that is to the right of that line, you need to round off. 5 is rounding up, so 7+1=8,therefore 875 rounded to the nearest ten is 880. :D
a 1 followed by 5 zeroes.