#### To determine

**To Find:** *x* such that ex>1,000,000,000

#### Answer

Based on the graph of f(x)=ex, the approximate value of *x* is 21 satisfying ex>1,000,000,000.

#### Explanation

The function f(x)=ex is an exponential function. The graph of the function is shown below:

From the graph its quite clear that, the approximate value of *x* for which ex>1,000,000,000, is *x* = 21.

**Conclusion:** Based on the graph of f(x)=ex, the approximate value of *x* is 21 satisfying ex>1,000,000,000.