Hello I'm Having a problem, I was given an assigment working with phone plans it order to determine which plan is cheaper The question asks when does it make sense to switch from PAYG to the 450-minute plan? Prove using an equation
Talk Time Pay as you go 450 minutes
0 0 $40
300 min $75 $40
450 min $112.50 $40
480 min $120.00 $53.50
540 min $135.00 $90.50
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