exam Maths Puzzle Numerical Ability

Celia bought 12 apples. She ate two of them. She sold the remaining apples for 20 cents more than she bought each of them. She profited $1.00. How much did she sell the apples for?

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exam Other Question

Expand and simplify: ln(xe)
Thats the problem that has been driving me crazy. I dont uderstand how logarithms work so any help with this is very much appreciated. Thanks so much! I have to divide the two polynomials (21c^2-29c-18) divided by (3c-5). Thank you in advance.