The half-life of a radioactive substance is 65 years. if you start with some amount of this substance, what fraction will remain in 132 years? (subject - quantitative reasoning) a) 0.24 b) 0.06 c) 4.09 d) 0.01

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