Which expression is equivalent to the given expression? 20ab/4a2b
O 5a1ºb3
O 5a4b2
O 5a6b
o 5,1662
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Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost. swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit