Answer:
The decrease of the decimal rate -1.05 mm/year can be rounded to -1. You don’t need to round 2.48 because you’re multiplying by -1. Since -1.05 is negative and rounded to a greater value, the estimate could be adjusted to a slightly lesser value, maybe -2.5 or -2.6.
Step-by-step explanation:
If you don't want to use that answer this is what they are looking for
Round -1.05 mm/year to –1.
Estimate the total variation as (-1)(2.48) = -2.48 mm.
Because -1.05 is negative and rounded to a greater value, adjust the estimate to -2.5 or -2.6 millimeters
