exam Maths Puzzle Numerical Ability

well this is actually from algebra 2.
3 The characteristic of log 6198 is _______
2
4
3
1

i really really have no idea how to do this problem... please help!

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exam Other Question

I need some help on this problem.

I need to arrange the following numbers from smallest to largest:

3.07, 37/10, 3.0712, 3.078, 371/100, 3.0717, 3.072, 3.071

Thanks! At a school play, 750 tickets were sold. Each adult paid $0.75 admission, and each student, $0.50. How many adults attended, if the receipts were $437.50?