How much interest will $3150 get in 6 months at annual interest at 8%

Luis borrowed $3150 from his brother Julio to pay for books and tuition. He agreed to repay Julio in 6 months with simple annual interest at 8%. (a) How much will the interest amount to? (b) What amount must Luis pay Julio at the end of 6 months?
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1 Answer

interest=3150*0.08*(1/2)

=126$

pae bak=3150+126=3276
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