Will give brainiest if correct a. 69.1 b. 20.9 c. 22.4 d. 67.6

I think it's D. But I'm not sure if my math was correct

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