Suppose you invest $500 in a savings account that pays 3.5% annual interest. when will the account contain at least $650?

Start with 650-500, then multiply by .035. So the entire equation would be 650-500= 150x.035= 5.25

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