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the simple interest (i) for a certain savings account varies jointly as the time (t) and the principal (p). after 4 years, a principal of 10,000 earns an interest of 1000. after how many years will 15,000 earn an interest of 5000​

The Simple Interest I For A Certain Savings Account Varies Jointly As The Time T And The Principal P After 4 Years A Principal Of 10000 Earns An Interest Of 100 class=