exam Maths Puzzle Numerical Ability

A piece of land measures 3 3/4 acres and is for sale at
$60,000. What is the price per acre?

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exam Other Question

log3(x^2-1)=1

hint:3 is a subscript
solve for x How do you tell wethere a triangle is a right triangle or not and how to give a reason.. for example here is a problem:

x=25 y=25 z=38