A strand of hair has an average mass of 2.17x10 to the power of -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 and scientific notation.
To find how much heavier a grain of rice is than a strand of hair, we need to subtract the mass of the hair from the mass of the rice:
0.002 ounces - 2.17 × 10^-5 ounces = 0.002 - 0.0000217 = 0.0019783 ounces.
So, a grain of rice is approximately 0.0019783 ounces heavier than a strand of hair.