if 6200 is invested in a savings account for wich intrest is compounded semi-annually, and if the 6200 turns into 7100 in three years what is the intrest rate of the savings account

Question

nincompoop · Answer

A = P(1+(r/n))^(nt) 
solve for r

nincompoop · Answer

semi-annually means twice a year or every six months
so that means your n = 2
t = 3 
nt = 6 
rewriting the formula will be 
A = P(1+(r/2))^(6) 
solve for r algebraically then plug the numbers in later also works

nincompoop · Answer

I hope you know algebra

nincompoop · Answer

NO BUENO? just waiting for the answer to fall from heaven?