Multiple Choice
Use the multiplication principle to solve the problem.
-Mark can remember only the first 5 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 16 seconds to try each one, how long would it take to try every possibility?
A) 26.7 minutes
B) 24 minutes
C) 5.3 minutes
D) 2.7 minutes
Correct Answer:

Verified
Correct Answer:
Verified
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