(a) Use the formula given in Example 1 to estimate the year that the U.S. population...

(a) Use the formula given in Example 1 to estimate the year that the U.S. population reached 100 million.

(b) Use the following U.S. Census Bureau data to say whether your estimate in part (a) is reasonable. In 1910 the population was approximately 92.2 million; in 1920 it was approximately 106.0 million.