Question

A swimmer's time in the 100-meter backstroke is 58 seconds when rounded to the nearest whole number. Name the fastest and slowest times possible, in decimals rounded to the hundredths place.

I don't understand this.

Answer 1

Simple,  fastest time possible is 57.99 
slowest time possiblle is 57.51 

hope it helps

Answer 2

The fastest time using decimal fractions to two decimal places is 57.99 and the slowest time is 57.5 ( remember the rule 5 or above round up, anything below 5 round down)