Daniel sees a lighthouse in the harbor. he estimates the angle of elevation is 70°. if the lighthouse is 140 feet tall, what is the approximate distance between daniel and the top of the lighthouse? (assume the lighthouse meets the ground at a right angle.)

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

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Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000