Complete the following sentences.

The number of deaths due to poisoning in the United States in $2009(39,000)$ is $\underline{\qquad \qquad}$ percent greater than the number of deaths due to falls $(26,100)$ (most recent data).

Restate the following facts as indicated.

There are approximately $2.2$ million marriages per year in the United States. Express this quantity in marriages per hour.

For each pair of measurements, state which one is more accurate and which one is more precise.

Your weight is $52.55$ kilograms. A scale at a health clinic that gives weight measurements to the nearest half kilogram gives your weight as $52 \frac{1}{2}$ kilograms. A digital scale at the gym that gives readings to the nearest $0.01$ kilogram gives your weight as $51.48$ kilograms.

Complete the following sentences.

The median age at first marriage of U.S. women ($26.1$ years) is $\underline{\qquad \qquad}$ percent less than the median age at first marriage of U.S. men ( $28.2$ years).

For each pair of measurements, state which one is more accurate and which one is more precise.

Your weight is $52.55$ kilograms. A scale at a health clinic that gives weight measurements to the nearest half kilogram gives your weight as $53$ kilograms. A digital scale at the gym that gives readings to the nearest $0.01$ kilogram gives your weight as $52.88$ kilograms.

Complete the following sentences.

The main span of the Tacoma Narrows bridge ($2800$ feet) is $\underline{\qquad \qquad}$ percent shorter than the main span of the Golden Gate bridge ($4200$ feet).

Restate the following facts as indicated.

There are approximately $4$ million births per year in the United States. Express this quantity in births per minute.

According to modern science, Earth is about $4.5$ billion years old and written human history extends back about $10,000$ years. Suppose you represent the entire history of Earth by $12$ hours on a clock, with the birth of Earth at the stroke of midnight and today at the stroke of noon.

a. How much time on the clock represents $1$ billion years?

b. How long before noon does written human history begin?

For each pair of measurements, state which one is more accurate and which one is more precise.

Your true height is $62.50$ inches. A tape measure that can be read to the nearest $\frac{1}{8}$ inch gives your height as $62 \frac{5}{8}$ inches. A new laser device at the doctor's office that gives readings to the nearest $0.05$ inch gives your height as $62.50$ inches.

Complete the following sentences.

The $2011$ life expectancy in Japan ($82.7$ years) is $\underline{\qquad \qquad}$ percent greater than the $2011$ world average life expectancy ($67.9$ years).

Complete the following sentences.

The gestation period of humans ( $266$ days) is $\underline{\qquad \qquad}$ percent longer than the gestation period of grizzly bears ($220$ days).

Use the Bureau of Labor Statistics inflation calculator to complete the following sentences.

Suppose that $Y$ is the year in which you were born and that $\$ C$ today is worth $\$ D$ in year $Y$. Is $C$ greater than or less than $D$?

For each pair of measurements, state which one is more accurate and which one is more precise.

Your true height is $70.50$ inches. A tape measure that can be read to the nearest $\frac{1}{8}$ inch gives your height as $70 \frac{3}{8}$ inches. $\mathrm{A}$ new laser device at the doctor's office that gives readings to the nearest $0.05$ inch gives your height as $70.90$ inches.

According to modern science, Earth is about $4.5$ billion years old and written human history extends back about $10,000$ years. Suppose you represent the entire history of Earth with a $100$-meter-long timeline, with the birth of Earth on one end and today at the other end.

a. What distance represents $1$ billion years?

b. How far from the end of the timeline does written human history begin?