Which of the following is a quantity that could be represented by the number 2 x 10-3?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.