Sammie pays $30 for a bag that she buys at a discount of 50%. what is the price of the bag without the discount?

$30/ (50/100)
= $30* (100/50)
= $60.

The original price of the bag is $60~

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