A bakery mixes cookie dough in large batches. For chocolate chip cookies, 10 cups of sugar and 20 cups of flour are needed. Write the ratio of sugar to flour for chocolate chip cookies. Express your answer as a simplified ratio.

Approximately 55 years.

Step-by-step explanation:

Since, according to the rule of 72,

An amount is doubled when the product of time ( In years ) and the annual interest rate ( in percentage ) is 72.

Here, the annual rate of interest = 1.3 %,

Let after t years the economy will be doubled,

Thus, by the above rule,

Thus, after 55 years ( approx ) the economy will be doubled.