How are real numbers used to describe real-world situations?

The equations and numbers you apply in math, will come in handy because in the future you may encounter problems like you faced in your math problems, so real numbers are very helpful.

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