A strand of hair has an average mass of 2.17×10^-5 ounces a grain of rice has an average mass of 0.0020 how much heavier is a grain of rice, then a strand of hair express your answer in scientific notation
To find how much heavier a grain of rice is than a strand of hair, we can subtract the mass of a strand of hair from the mass of a grain of rice:
0.0020 - 2.17×10^-5 = 0.0020 - 0.0000217 = 0.0019783
Therefore, a grain of rice is 1.9783 x 10^-3 ounces heavier than a strand of hair.