The apr of vinny's savings account is 3.5% , but interest is compounded only once a year. what is the apy of vinny's saving account?

1+r=1+0.35
Solve for r you will get the same rate
The answer is 3.5%

Idon't know that language

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post