An infinite number of fractions of a second.
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21.10, 21.12, 21.13....... and so on.
10 minutes + 11 minutes = 21 minutes 58 seconds + 21 seconds = 79 seconds 79 seconds = 1 minute and 19 seconds 21 minutes + 1 minute and 19 seconds = 22 minutes and 19 seconds
22
1,260 seconds
To determine which whole number 21.49 is closer to, we can look at the tenths place. Since 21.49 is closer to 21 than to 22, we can conclude that 21.49 is closer to 21. This is because the digit in the tenths place is 4, which is less than 5. Therefore, 21.49 is closer to 21.