exam Maths Puzzle Numerical Ability

log(1/3)27

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exam Other Question

Hi, ive been asked to answer the following questions, and having great difficulty, i have managed to answer the first question, (although with ALOT of help), but i was wondering if Lane invested $14000 part at 15% and part at 2%. If the total interest at the end of the year is $1060, how much did she invest at 15%. Please help. What formula could I use?