Design a method to determine the solubility of an unknown substance at $50^{\circ} \mathrm{C}$.

The General Social Survey asks questions about one's happiness in marriage. Is there an association between gender and happiness in marriage? Use the data in the table to determine if gender is associated with happiness in marriage. Treat gender as the explanatory variable.

$$\begin{matrix} \text{ } & \text{Male} & \text{Female} & \text{Total}\\ \text{Very happy} & \text{7690} & \text{7942} & \text{15551}\\ \text{Pretty happy} & \text{3738} & \text{4447} & \text{8185}\\ \text{Not too happy} & \text{259} & \text{460} & \text{719}\\ \text{Total} & \text{11606} & \text{12849} & \text{24455}\\ \end{matrix}$$

You want to create a circuit from the following materials: a battery, copper wire, a switch, and three light bulbs. Design your circuit so that the light bulbs shine as brightly as possible. Draw a circuit diagram to reflect your design.

The area of the United States is about 6,000,000 square miles. The area of Hawaii is about 11,000 square miles. Use an indirect proof to show that at least one of the fifty states has an area greater than 120,000 square miles.

How did the creation of the Fed improve our banking system?

Understanding the evolution of our banking system is important because it helps us understand the features of modern banking. Today we have a managed money supply that is accepted by everyone simply because people have faith in it. Which of the following is true about our banking system today?

a) Most of our money circulates as coins and paper currency.

Recall the table discussed before that gives the price of a gallon of regular gasoline in the United States (in dollars) for the years $2003$ through $2011$. Another table discussed gives the price of a gallon of regular gasoline in the United States (in dollars) for the years $1990$ through $2002$.

By using $1990$ as the base year, construct a simple index for the prices of a gallon of regular gasoline in both tables.

Modern jet engines have vanes that are deployed to produce a reverse thrust just after a plane touches down on a runway. The air flow rate through a particular engine is $100 \mathrm{~kg} / \mathrm{s}$, and the combustion gases exit the engine at a speed of $800 \mathrm{~m} / \mathrm{s}$ relative to the engine. The fuel-air ratio is 1 to 40 in this case. Calculate the reverse thrust produced by the vanes for the configuration shown.

The Enormous State University’s Accounting Society has decided to produce a version of the ballet Swan Lake, in which all the female roles (including all of the swans) will be danced by men, and vice versa. Here are the main characters: Prince Siegfried. Prince Siegfried’s Mother. Princess Odette, the White Swan. The Evil Duke Rotbart. Odile, the Black Swan. Cygnet #1, young swan. Cygnet #2, young swan. Cygnet #3, young swan. The ESU Accounting Society has on hand a total of 4 female dancers and 12 male dancers who are to be considered for the main roles. How many possible casts are there?

$\textbf{\textcolor{#4257b2}{Mental Math}} \hspace{10pt}$ Determine whether the given number is a solution of the inequality.

$$\begin{array}{lcccc} x < -8 \hspace{25pt} & \textbf{a.}\hspace{10pt}0 \hspace{25pt} & \textbf{b.}\hspace{10pt} -8 \hspace{25pt} & \textbf{c.}\hspace{10pt} -9 \hspace{25pt} & \textbf{d.}\hspace{10pt} -7\\ \end{array}$$

The first bridge over the Piscataqua River, built in $1794$, was the longest bridge in the world. The modern bridge, completed in $1971$, is not the world's longest, but it is well known for its elegant symmetric design. The bridge connects Kittery, Maine with Portsmouth, New Hampshire.

Does the Piscataqua River Bridge have any lines of symmetry? If so, make a simple sketch of the bridge and draw all of its lines of symmetry.

Rewrite the following sentence, inserting parentheses, end marks, and capital letters where necessary. Example 1. Lyndon B. Johnson $1908–1973$ was the thirty-sixth president of the United States. $\underline{\text{\color{#c34632}Lyndon B. Johnson (1908–1973) was the thirty-sixth president of the United States.}}$

His letter how thrilled I was to receive it enclosed recent photos.

The following are nine technical accounting terms introduced or emphasized in this chapter:

$$\begin{array}{lll}\text { Responsibility margin } & \text { Transfer price } & \text { Common fixed costs } \\ \text { Contribution margin } & \text { Cost-plus transfer price } & \text { Traceable fixed costs } \\ \text { Performance margin } & \text { Product costs } & \text { Committed fixed costs }\end{array}$$

Each of the following statements may (or may not) describe one of these technical terms. For each statement, indicate the accounting term described, or answer "None" if the statement does not correctly describe any of the terms.

c. Fixed costs that are readily controllable by the manager.

Design a controlled experiment to determine whether earthworms are more attracted to perfume or to vinegar.

Thomas Jefferson was born in 1743. How old was he when he was elected president of the United States in 1800? (Write an equation and solve the problem.)