Beverages. As sales of soft drinks decrease in the United States, sales of coffee are increasing. The revenue from sales of soft drinks, in billions of dollars, is approximated by

$$

s(t)=0.33 t+17.1

$$

and the revenue from the sales of coffee, in billions of dollars, is approximated by

$$

c(t)=0.6 t+9.3

$$

For both functions, $t$ represents the number of years after $2010 .$ Using an inequality, determine those years for which there will be more revenue from the sale of coffee than from soft drinks.