Chris is standing 40m from the base of a cliff and noted that the height of the cliff was 70m. What was the angle at which he was looking up? Assume his eye level is 1m above the ground.

Hey dear, hoping i'll be

9sandwiches per hour

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,