Solve the problem.
mark can remember only the first 4 digits of his friend's phone number. he...
Mathematics, 29.08.2019 03:00, kennydenny4897
Solve the problem.
mark can remember only the first 4 digits of his friend's phone number. he also knows that the number has 7 digits and that the last digit is not a 0. if mark were to dial all of the possible numbers and if it takes him 21 seconds to try each one, how long would it take to try every possibility?
Answers: 1
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