Question

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)

Answer 1

is this correct?

Answer 2

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.

The mass of a grain of rice is given as 0.002 ounces, and the mass of a strand of hair is given as 2.17×10^−5 ounces.

Subtracting these two values gives:
0.002 - 2.17×10^−5 = 0.0019983 ounces

To express this answer in scientific notation, we can write it as:
1.9983×10^−3 ounces

Answer 3

Apologies for the error in the previous response. Let's correct the calculation:

To find the difference in weight between a grain of rice and a strand of hair, we subtract the mass of the hair from the mass of the rice.

Given:
Mass of hair = 2.17×10^−5 ounces
Mass of rice = 0.002 ounces

So the difference in weight can be calculated as:

0.002 ounces - 2.17×10^−5 ounces

To subtract these values, we need to convert 2.17×10^−5 ounces to the same unit as 0.002 ounces.

Converting 2.17×10^−5 ounces to standard decimal notation, we have:

2.17×10^−5 = 0.0000217

Now, we can subtract the two values:

0.002 ounces - 0.0000217 ounces = 0.0019783 ounces

To express the answer in scientific notation, we need to move the decimal point to the proper location and adjust the exponent:

0.0019783 ounces can be written as 1.9783×10^−3 ounces.

Therefore, a grain of rice is approximately 1.9783×10^−3 ounces heavier than a strand of hair.

Apologies for any confusion caused by my previous incorrect response.