Answer :
Final answer:
Dust mites have dimensions of 0.00042 meters in length and 0.00028 meters in width. An average mattress contains 2,000,000 dust mites.
Explanation:
The length of a dust mite is 0.00042 meters, which can be written as 4.2 x 10-4 meters in scientific notation. The width of a dust mite is 0.00028 meters, which can be written as 2.8 x 10-4 meters in scientific notation. The average number of dust mites in a mattress is 2,000,000, which can be written as 2 x 106 dust mites in scientific notation.
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