exam Maths Puzzle Numerical Ability

How do you evaluate

1. log base is 12 544 ? do I divide 544 by 12?
2. log base .5 24?

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exam Other Question

A rectangle is 6 cm long and 5 cm wide. When each dimension is increased by x cm, the total area is tripled. Find the value of x using algebra.

Thank you for your help. How do I graph the solution set of x<-7??? Thanks ALLLLLOT to whomever, helps me with this one!!!