What is 80,300,000,000 written in scientific notation?

The graph shown below expresses a radical function that can be written in the form f(x)=a(x+k)1/n+c what does the graph tell you about the value of n in this function

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

True or false look at the picture pls : /