solve please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Step-by-step explanation:
1. principal: $640 rate: 12 1/2% time: 6 months= 1/2 year
i= prt/100
= 640*25/2*1/2 / 100
= 40
a= p+i= 640+40 = 680
2. principal: $10,000 rate: 18% time: 7 years
i = 10,000*18*7/100
= 12600
a= p + i = 10000+12600= 22600
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