Determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. Credit reports contain bankruptcy information.

Find out three recent news reports that quote percentages. In each case, describe the use of the percentage (as a fraction, to describe change, or for comparison) and explain its context.

Sodium carbonate $\left(\mathrm{Na}_2 \mathrm{CO}_3\right)$ placed in water forms a basic solution. Carbonic acid $\left(\mathrm{H}_2 \mathrm{CO}_3\right)$ in water forms an acidic solution. Use equations to explain these results:

Net income for the year for Carrie, Inc. was $750,000, but the statement of cash flows reports that net cash provided by operating activities was$860,000. What might account for the difference?

What are the singular masculine, plural masculine, singular feminine and plural feminine forms of the word aquel?

Determine whether the pair of ratios forms a proportion.

$$\frac { 2 } { 5 }$$

and

$$\frac { 10 } { 25 }$$

How does a zygote form? What happens to the zygote about four days after it forms?

The following table presents the number of reports of graffiti in each of New York’s five boroughs over a one-year period. These reports were classified as being open, closed, or pending.

$$\begin{array}{lrrrr} \hline & \text{Open} & \text{Closed} & \text{Pending} & \\ \text{Borough} & \text{Reports} & \text{Reports} & \text{Reports} & \text{Total}\\ \hline \text{Bronx} & 1,121 & 1,622 & 80 & 2,823\\ \text{Brooklyn} & 1,170 & 2,706 & 48 & 3,924\\ \text{Manhattan} & 744 & 3,380 & 25 & 4,149\\ \text{Queens} & 1,353 & 2,043 & 25 & 3,421\\ \text{Staten Island} & 83 & 118 & 0 & 201\\ \hline \text{Total} & 4,471 & 9,869 & 178 & 14,518\\ \end{array}$$

A graffiti report is selected at random. Compute the following probabilities.

$\textbf{a.}\hspace{10pt}$ The report is open and comes from Brooklyn.

$\textbf{b.}\hspace{10pt}$ The report is closed or comes from Queens.

$\textbf{c.}\hspace{10pt}$ The report comes from Manhattan.

$\textbf{d.}\hspace{10pt}$ The report does not come from Manhattan.

$\textbf{e.}\hspace{10pt}$ The report is pending.

$\textbf{f.}\hspace{10pt}$ The report is from the Bronx or Staten Island.

State whether the following statement is true or false, and explain why. If a statement is false, state the true change. A high school reports that its students' SAT scores were down by $10 \%$ in one year. The next year, however, SAT scores rose by $20 \%$. The high school principal announces, "Overall, test scores have improved by $10 \%$ over the past two years."

A $1.00 \cdot 10^{-6} \ g$ sample of nobelium, $_{102}^{254} \mathrm{No}$, has a half-life of 55 seconds after it is formed. What is the percentage of $_{102}^{254} \mathrm{No}$ remaining at the following times?

(a) 5.0 min after it forms

(b) 1.0 h after it forms

State whether the following statements are true or false, and explain why. If a statement is false, state the true change.

A high school reports that its students' SAT scores were down by $20 \%$ for one year. The next year, however, SAT scores rose by $30 \%$. The high school principal announces, "Overall, test scores have improved by $10 \%$ over the past two years."

Now, fill in the blanks in the following sentences with the correct forms of the verbs in parentheses.
Yo... mucho. (bailar)

Let u = (3, -4 ), v = (-7, 8), and w = (5, 5). Find the component forms of the following vectors. u + w

Multiple choice is the format used for most national certification examinations. Choose the correct answer to the statement or question. (LO 3.2, 3.3, 3.4, 3.7, 3.8)

What forms the gliding surface where two bones meet to form a joint? a. cartilage b. blood vessels c. collagen d. ligaments e. lymph