Michelle's management techniques seemed to work well, but they violated many traditional rules of good leadership.

From this sentence, we can infer that Michelle uses _______ techniques.

What would be a good hash code for a vehicle identification number that is a string of numbers and letters of the form "9X9XX99X9XX999999," where a "9" represents a digit and an " $\mathrm{X}$ " represents a letter?

Air Quality Index (AQI) data for the city of Kitchener, Ontario, Canada, during the period January 1, 2010, to June 21, 2012, produced the following percentage distribution:

$$\begin{array}{l|cccr} \hline \text { AQI } & \text { Very good } & \text { Good } & \text { Moderate } & \text { Poor } \\ \hline \text { Percentage } & 13.10 & 71.81 & 14.76 & 0.33 \\ \hline \end{array}$$

The AQI data for a sample of 1100 readings from cities like Kitchener (population: 150,000 to 250,000; metropolitan area: 400,000–500,000) are shown in the following table:

$$\begin{array}{l|cccc} \hline \text { AQI } & \text { Very good } & \text { Good } & \text { Moderate } & \text { Poor } \\ \hline \text { Number of readings } & 127 & 816 & 150 & 7 \\ \hline \end{array}$$

Check to see if the distribution of the $\mathrm{AQI}$ for the sample data differs from the distribution for Kitchener, Ontario, at a $5 \%$ level of significance.

The elasticity of a good is $E=2$. What is the effect on demand of:

(a) A $3 \%$ price increase?

(b) A $3 \%$ price decrease?

Find the exact price that maximizes revenue for sales of the product.

(a) Recall: Give one sample of the way Smith praises his own good qualities. (b) Infer: What impression of Smith do you get from this account?

If a nation that imports a good imposes a tariff, it will increase

a. the domestic quantity demanded.

b. the domestic quantity supplied.

c. the quantity imported from abroad.

d. the efficiency of the equilibrium.

Learning words as opposites is a good strategy. Match each of the following affirmative words with the negative word that means the opposite.

*algunos

A.nada B.tampoco C.nadie D.ningunos E.nunca

Compare your answers to Exercises $5$ and $6$. Is Euler's method doing a good job in this case? What would you do to avoid the difficulties that arise in this case?

Underline the adjectives, including articles, possessive pronouns, possessive forms of nouns, and proper adjectives in given below sentence.
A good hiking bood needs a sturdy sole.

The researcher in the earlier exercise is content with the second regression. But he has found a number of shells that have large residuals and is considering removing all of them. Is this good practice?

Learning words as opposites is a good strategy. Match each of the following affirmative words with the negative word that means the opposite.

*siempre

A.nada B.tampoco C.nadie D.ningunos E.nunca

Identify each of the following sentences as simple or compound. Rewrite each compound sentence as two simple sentences.

Good Running was kind, and he adopted Long Arrow.

Figure 15P-2 shows the monopolistically competitive market for smartphones.

b. In the long run, will supply or demand for this producer's good be affected? Will economic profits increase or decrease for this producer?

Indicate what would happen to the current demand for pencils as a result of each of the following changes.

Pencil consumers experience an increase in income. (Pencils are considered a normal good.)