When Bella runs the 400 meter dash, her finishing times are
normally distributed with a mean of 83 seconds and a standard
deviation of 1.5 seconds. Using the empirical rule, determine the
interval of times that represents the middle 99.7% of her finishing
times in the 400 meter race.

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?