If i write one digit per second, how long will it take me to write out all the numbers from 1 to 1989? how long : a) 33 min 9 sec b)1 h 22 min 39 sec 3)1 h 54 min d) 1 h 54 min 9 sec e) 2 h 12 min 9 sec i have an exam on sat, average is 1 min 30 sec for each question so i need to know how to do this quickly pleeease.

1 - 9: 9 digits

10 - 99: 90*2 = 180 digits

100 - 999: 900*3 = 2700 digits

1000 - 1989: 990*4 = 3960 digits

This makes 6849 digits or 6849 seconds

D) 1 h 54 min 9 sec

step-by-step explanation:

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