exam Maths Puzzle Numerical Ability

Yesterday I submitted this problem;however,forgot to include e.
Please help.Thank You

the number of bacteria present in a culture after t minutes as B=100e^kt If there are 6231 bacteria present after 11 minutes, find k.

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exam Other Question

1) Rosa Quezada is reimbursed when she uses her own car in her work as a sales representative for Logos Publishing. She is repaid for all tolls, she gets $0.40 per mile that she dr Two cars leave at the same time traveling in different directions. One goes North at 6 mph and the other goes west at 8mph. How far apart are they after 4 hrs.