Which waves require a material medium for transmission? a.) light waves b.) radio waves c.) sound waves d.) microwaves
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The simplest way to do this is to set up equivalent fractions, like this-
= 
Solve for x by using cross multiplication.
40*2.2= 88
1*x=88
x=88
Therefore, the boy weighs 88lbs.
Solve for x by using cross multiplication.
40*2.2= 88
1*x=88
x=88
Therefore, the boy weighs 88lbs.