exam Maths Puzzle Numerical Ability

Solve log(1/8) x=-1.

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exam Other Question

I am helping my 13 year old with his homework. Please tell me what slope is and how it is measured in general. We are using an Egyptian pyramid as a model.
Thank you !
evaluate the determinant:

| 1 -3 2 0|
|-3 -1 0 -2|
| 2 1 3 1|
| 2 0 -2 0|</PRE>