How to solve natural log equations without a calculator?

Who long does it take to drive 150 miles at 45 miles per hour

The bolo cavern outside of vandalia is 421 ft below sea level. a little more than75 miles away. mt owens is 7295 feet above sea level. what is the difference in elevation between the bolo cavern and mt owens?

Six random samples were taken each year for three years. the table shows the inferred population for each type of fish for each year.