nm. A nanometer represents 10 ^ -9 or one billionth of a meter.
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2.5 cm is more precise.
The measurement 0.000065 cm written in scientific notation is: 1.5 × 10-8cm
The length is 20 cm.
.229/.225 = 1.0178 percent error = (1.0178 - 1) times 100 to get to percent = .0178 x 100 = 1.78%
If 160 square cm represents an area of a substance and 32 cm its height, then volume = 160x32 = 5120 cubic cm