Starting from a $2013$ population of $7.1$ billion, use the given growth rate to find the approximate doubling time (use the rule of $70$) and to predict world population in $2050$.

Use the average annual growth rate between $1950$ and $2000$, which was about $1.8 \%$.

State whether the growth (or decay) is linear or exponential, and answer the associated question.

The value of your car is decreasing by $10 \%$ per year. If the car is worth $\$ 12,000$ today, what will it be worth in two years?

Refer to the Brief Review on the said page. Determine whether each statement is true or false without doing any calculations. Explain your reasoning.

$10^{3.334}$ is between $500$ and $1000$.

Use the earthquake magnitude scale to answer the questions.

What magnitude earthquake would release energy equivalent to that of a $1$ -megaton nuclear bomb $\left(5 \times 10^{15}\right.$ joules $)$ ? Which would be more destructive, the bomb or the earthquake? Why?

State whether the growth (or decay) is linear or exponential, and answer the associated question.

The price of computer memory is decreasing at a rate of $14 \%$ per year. If a memory chip costs $\$ 50$ today, what will it cost in three years?