Chapter 2, Problem 22RE

U.S. Electric Energy United States electrical energy production (in trillions of kilowatt-hours) in year $t$ (with $1990$ corresponding to $t=0$) is given by $f\left(t\right)$, where $f$ and it’s derivative are graphed in Figs. $5$

(a) and $5$ (b).

a. How much electrical energy was produced in $1950$?

b. How fast was the energy production rising in $1950$?

c. When did the energy production reach $3000$ trillions kilowatt-hours?

d. When was the level of energy production rising at the rate of $10$ trillions kilowatt-hours per year?

e. When was the energy production growing at the greatest rate? What was the level of production at that time?