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

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

Listed below are nine technical accounting terms used in this chapter:

$$\begin{array}{lll}\text { Unrecorded revenue } & \text { Adjusting entries } & \text { Accrued expenses } \\ \text { Book value } & \text { Matching principle } & \text { Accumulated depreciation } \\ \text { Unearned revenue } & \text { Materiality } & \text { Prepaid expenses }\end{array}$$

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.
h. An expense representing the systematic allocation of an asset's cost over its useful life.

In many of the world’s poorest countries, nearly 50 percent of the population is under 15 years of age. If these people are to help improve the productivity of their economies, they must be trained in modern methods of production. In 2000, just over 4 million of the 8.8 million people of Chad were under 15. Explain why it would be difficult for many of these children to be educated and become productive members of a growing economy.

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

$$\begin{array}{lcccc} x \leq 10 \hspace{25pt} & \textbf{a.}\hspace{10pt}4 \hspace{25pt} & \textbf{b.}\hspace{10pt}-10 \hspace{25pt} & \textbf{c.}\hspace{10pt}0 \hspace{25pt} & \textbf{d.}\hspace{10pt} 11\\ \end{array}$$

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.

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

The production of forages in the United States equals $\rule{1cm}{1pt}$ percent of the land used for crops.
a. $25$
b. $35$
c. $50$\ d. $65$

Explain the design of the type of gas container shown in the illustrations and graphs in Lesson 3.

Listed below are nine technical accounting terms:

$$\begin{array}{lll}\text { Variable costs } & \text { Relevant range } & \text { Contribution margin } \\ \text { Break-even point } & \text { Fixed costs } & \text { Semivariable costs } \\ \text { Economies of scale } & \text { Sales mix } & \text { Unit contribution margin }\end{array}$$

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.

g. Costs that respond to changes in sales volume by less than a proportionate amount.

Are the marks one receives in a course related to the amount of time spent studying the subject? To investigate this mysterious possibility, a student took a random sample of 10 students who had enrolled in an accounting class last semester. He asked each to report his or her mark in the course and the total number of hours spent studying accounting. These data are listed here: Study

$$\begin{array}{rllllllllll}\text { time } & 40 & 42 & 37 & 47 & 25 & 44 & 41 & 48 & 35 & 28 \\ \text { Marks } & 77 & 63 & 79 & 86 & 51 & 78 & 83 & 90 & 65 & 47\end{array}$$

Calculate the covariance.

How can you determine whether there is an interaction in the two-factor factorial design?

Construct a Plackett-Burman design for 10 variables containing 24 experimental runs.

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

$$\begin{array}{lcccc} y < 5 \hspace{25pt} & \textbf{a.}\hspace{10pt}0 \hspace{25pt} & \textbf{b.}\hspace{10pt}5 \hspace{25pt} & \textbf{c.}\hspace{10pt}-1 \hspace{25pt} & \textbf{d.}\hspace{10pt} -5\\ \end{array}$$

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?

c) Our banking system is shifting away from electronic bookkeeping.

The Modern Language Association plans a three-day meeting. The program committee requests 15 overhead projectors for the first day, 28 for the second day, and 19 for the third day. Projectors may be rented for a single day for $17, and they may be rented for two consecutive days for$30. How many should be rented for a single day and how many should be rented for two consecutive days to minimize rental costs?