Choose the correct answer.

Please let employees know if you would like them to dress (a) nicer, (b) more nicely for business meetings.

Choose the correct answer.

Since we started using live chat for handling customer inquiries, the process runs (a) smoother, (b) more smoothly.

Choose the correct answer.

If you had been (a) more observant, (b) observanter, you would have noticed the speaker's body language.

Choose the correct answer.

The (a) active voice, (b) passive voice is called the voice of business.

Why is there a relatively high frequency of dense fog along the Pacific Coast?

A Mach number $M$ indicates the speed of a supersonic airplane. You can find an airplane's speed $a$ in miles per hour using the formula $a=M s$ where $s$ is the speed of sound at the altitude of the airplane. Find an airplane's speed in miles per hour if the airplane travels at Mach $2.5$ at an altitude where the speed of sound is $710 \mathrm{mi} / \mathrm{h}$. A. $177.5 \mathrm{mi} / \mathrm{h}$ B. $284 \mathrm{mi} / \mathrm{h}$ C. $1775 \mathrm{mi} / \mathrm{h}$ D. $2840 \mathrm{mi} / \mathrm{h}$

Choose the correct answer.

Of the two proposals, this one is (a) more, (b) most persuasive.

Name four industries besides the garment trade that rely on textiles.

Why did the passage of the Hawley Smoot Tariff result in a decline in American foreign trade in 1930?

What impact do agreements such as NAFTA have on the free enterprise system in the United States? What are the pros and cons of US participation in free trade treaties?

Name the following compounds:

(a) $\mathrm{PCl}_5$,

(b) $\mathrm{Na}_2 \mathrm{SO}_4$,

(c) $\mathrm{Ca}_3 \mathrm{~N}_2$,

(d) $\mathrm{Fe}\left(\mathrm{NO}_3\right)_3$,

(e) $\mathrm{SO}_2$, (f) $\mathrm{Br}_2 \mathrm{O}_5$

Check Your Understanding Which of the following compounds would be soluble in water at room temperature?

(a) $\mathrm{NH}_4 \mathrm{Cl}$,

(b) $\mathrm{KOH}$,

(c) $\mathrm{Ca}\left(\mathrm{CH}_3 \mathrm{COO}\right)_2$,

(d) $\mathrm{Ba}_3\left(\mathrm{PO}_4\right)_2$

The engine of a model rocket accelerates the rocket vertically upward for $2.0 \mathrm{~s}$ as follows: At $t=0$, the rocket's speed is zero; at $t=1.0 \mathrm{~s}$, its speed is $5.0 \mathrm{~m} / \mathrm{s}$; and at $t=2.0 \mathrm{~s}$, its speed is $16 \mathrm{~m} / \mathrm{s}$. Plot a velocity vs. time graph for this motion, and use the graph to determine (b) the instantaneous acceleration of the rocket at $t=1.5 \mathrm{~s}$.

Multiply or divide if possible.

$$\frac { 1 } { 2 } \left( - \frac { 4 } { 5 } \right)$$