book Maths Puzzle Numerical Ability

please help me solve this:
log x = 3

thanks. mallory

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book Other Question

A rectanguliar field is 5 times as long as it is wide, with a perimeter of 288 yards. (Please help!!)

Thank you in advance:) FIND THE ZEROS

x^2+2x-63=y

x^2-x-72=y