Answer
(a) $2,784,000$
(b) $2,784,075$
(c) Not significant
Work Step by Step
(a) Using rounding to solve the problem, we obtain:
$$ 2,788,000 - 4,000 = 2,784,000$$
(b) The exact answer would have been:
$$ 2,788,000 - 3,925 = 2,784,075$$
(c) This difference is not significant. Since there are millions of car accidents, a difference of 75 accidents is a small difference in our overall answer.