(new amount-old amount)=(198,000)-(100,000)=98% increase
98/5 years=19,600 Yr 1=$100,000+19,600=$119,600 Yr 2=$119,600+19,600=$139,200 Yr 3=$139,200+19,600=$158,800 Yr 4=$158,800+19,600=$178,400 Yr 5=$178,400+19,600=$198,000
The mortgage grew at a steady rate of $19,600 over the 5 years...
First let as solve all unit pirce whistles 21.25 / 25 = $ 0.85 per unit 36 / 50 = $ 0.72 per unit 60 / 80 = $ 0.75 per unit kazoos 10 / 25 = $ 0.4 per unit 18.50 / 50 = $ 0.37 per unit 27.20 / 80 = $ 0.34 per unit a.) $ 0.85 - $ 0.72 = $ 0.13 b.) 10 / 25 = $ 0.4 per unit c.) he must order 80 kazoos she should order
