A waterbed filled with water has the dimensions $8.0 \mathrm{ft} \times 7.0 \mathrm{ft} \times 0.75 \mathrm{ft}$. Taking the density of water to be $1.00 \mathrm{~g} / \mathrm{cm}^3$, how many kilograms of water are required to fill the waterbed?

In Europe, nutritional information is given in kilojoules $(\mathrm{kJ})$ instead of nutritional calories (1 nutritional calorie $=$ $1 \mathrm{kcal})$. A packet of soup has the following nutritional information:

$$250 \mathrm{~mL} \text { of soup }=235 \mathrm{~kJ}$$

How would that same packet be labeled in the United States if the information has to be given in nutritional calories per cup? (There are $4.18$ joules in one calorie and 2 cups to a pint.)

A lap in most tracks in the United States is $0.25 \mathrm{mi}$ (English lap). In most countries that use the metric system, a metric lap is $0.40 \mathrm{~km}$. A champion marathon runner covers a mile in about $5.0 \mathrm{~min}$. How many minutes will the runner take to run an English lap? A metric lap?

Calculate the following to the correct number of significant figures. Assume that all these numbers are measurements.

(a) $x=17.2+65.18-2.4$

(b) $x=13.0217 / 17.10$

(c) $x=(0.0061020)(2.0092)(1200.00)$

(d) $x=0.0034+\frac{\sqrt{(0.0034)^2+4(1.000)\left(6.3 \times 10^{-4}\right)}}{(2)(1.000)}$

An average adult has $6.0 \mathrm{~L}$ of blood. The Red Cross usually takes 1 pint of blood from each donor at a donation. What percentage (by volume) of a person's blood does a blood donor give in one donation?

A solid with an irregular shape and a mass of $11.33 \mathrm{~g}$ is added to a graduated cylinder filled with water $(d=$ $1.00 \mathrm{~g} / \mathrm{mL}$ ) to the $35.0-\mathrm{mL}$ mark. After the solid sinks to the bottom, the water level is read to be at the $42.3-\mathrm{mL}$ mark. What is the density of the solid?

The volume of a sphere is $4 \pi r^3 / 3$, where $r$ is the radius. One student measured the radius to be $4.30 \mathrm{~cm}$. Another measured the radius to be $4.33 \mathrm{~cm}$. What is the difference in volume between the two measurements?

Gallium is one of the few metals that can melt at room temperature. Its melting point is $29.76^{\circ} \mathrm{C}$. If you leave solid gallium in your car on an early summer morning when the temperature is $75.0^{\circ} \mathrm{F}$, what physical state is the gallium in when you return to your car and the interior car temperature is $85.0^{\circ} \mathrm{F}$ ?

A metal slug weighing $25.17 \mathrm{~g}$ is added to a flask with a volume of $59.7 \mathrm{~mL}$. It is found that $43.7 \mathrm{~g}$ of methanol $(d=0.791 \mathrm{~g} / \mathrm{mL})$ must be added to the metal to fill the flask. What is the density of the metal?

Trace the path of light through the eye.

The egg whites from four "large" eggs occupy a volume of $112 \mathrm{~mL}$. The mass of the egg whites from these four eggs is $1.20 \times 10^2 \mathrm{~g}$. What is the average density of an egg white from one "large" egg?

The cup is a measure of volume widely used in cookbooks. One cup is equivalent to $225 \mathrm{~mL}$. What is the density of clover honey (in grams per milliliter) if three quarters of a cup has a mass of $252 \mathrm{~g}$?

The Robinson family bought their home in 1996 for $152,400. When they sold it in 2008, the value was$174,900. What was the annual rate of change in the value of the home? $$ A \ $1225 \\ B \ $1875 \\ C \ $22,500 \\ D \ $27,275 $$

Carmen works tor an electronics retailer. She earns a weekly salary of $\$450$ plus a commission of $4,5\%$ on her weekly sales. Write a linear equation for Carmen's weekly earnings E if she lias d dollars in sales.

$F.~~ E = ( 450 + 4.5 ) d$

$$G.~~ E = ( 450 + 0.045 ) d$$

$$H. ~~ E = 450 + 0.045 d$$

$$J. ~~ E = 450 + 4.5d$$