A strand of hair has an average mass of 2.17×10^−5 ounces. A grain of rice has an average mass of 0.002 ounces. How much heavier is a grain of rice than a strand of hair? Express your answer in scientific notation.(1 point)
×
ounces
To find how much heavier a grain of rice is than a strand of hair, we need to subtract the mass of a strand of hair from the mass of a grain of rice.
0.002 ounces - 2.17x10^-5 ounces = 0.002 - 0.0000217 = 0.0019783 ounces
Therefore, a grain of rice is 1.9783x10^-3 ounces heavier than a strand of hair.