Many periods and all exclamation points and question marks have been omitted from the following passage. Write each word that should be followed by an end mark, add the appropriate end mark, and as needed, capitalize the first word of the sentence following the end mark. For any quotation requiring an end mark, include the closing quotation marks to show the proper placement of the end mark.

EXAMPLES :[1] Dr. Lynn Block, director of research for the Larson Soap Company, looked at her appointment book

1. book. [2] "oh, no" she groaned
2. "Oh, no!"; groaned.

*Oh. dear," thought Dr. Block as she surveyed the young man's torn jeans, unironed T-shirt, and shaggy hair

Name the following compounds using Greek prefixes when needed: (a) $\mathrm{PCl_3}$, (b) $\mathrm{SO_2}$, (c) $\mathrm{Cl_2O_7}$, and (d) $\mathrm{H_2S}$. (Hint: See the list of prefixes above.)

Consider $1.25$-$\mathrm{~g}$ samples of each of the following compounds. Calculate the number of moles of the compound present in each sample.

c. $\text{C}_2\text{H}_2(g)$

Suppose that the number of units produced daily at factory A is a random variable with mean 20 and standard deviation 3 and the number produced at factory B is a random variable with mean 18 and standard deviation 6. Assuming independence, derive an upper bound for the probability that more units are produced today at factory B than at factory A.

Determine whether the statement is true or false. An $n\times n$ matrix $A$ is said to be similar to an $n\times n$ matrix $B$ if $B=P^TAP$.

In an experiment on the behavior of young children, each subject is placed in an area with five toys. The response of interest is the number of toys that the child plays with. Past experiments with many subjects have shown that the probability distribution of the number X of toys played with is as follows:

Describe the details of a simulation you could carry out to approximate the mean number of toys $\mu_{X}$ and the standard deviation $\sigma_{X}$. Then carry out your simulation. Are the mean and standard deviation produced from your simulation close to the values you calculated in (a)?

Write formulas for each of the following ionic compounds. a) manganese(II) carbonate b) barium iodide dihydrate c) aluminum oxide d) magnesium sulfite e) ammonium nitrate f) sodium cyanide

Does a larger concentration of fish attract more predators? One study looked at kelp perch and their common predator, the kelp bass. The researcher set up four large circular pens on sandy ocean bottoms off the coast of southern California. He chose young perch at random from a large group and placed 10,20,40, and 60 perch in the four pens. Then he dropped the nets protecting the pens, allowing bass to swarm in, and counted the perch left after 2 hours. The equation of the least-squares regression line is $\hat{y}$=0.120+0.00857x where y= proportion of perch killed and x= number of perch in pen.

What is the evidence for $H_a$?

Determine why it is important to identify carefully the problem to be solved.

Solve the percent problem.
16 is what percent of 200?

The heats of combustion of 1,2-epoxybutane (2-ethyloxirane) and tetrahydrofuran have been measured: one is 2499 kJ/mol; the other is 2546 kJ/ mol. Match the heats of combustion with the respective compounds.

What is the freezing point of each of the solutions in Problem 8.88?

Family doctors record the growth of their young patients. At each checkup, Jennifer's younger sister has her height and mass measured.

$$\begin{array}{|l|c|c|c|c|c|c|} \hline \text { Height (cm) } & 58 & 60 & 64 & 68 & 73 & 74 \\ \hline \text { Mass (kg) } & 5.0 & 6.3 & 7.3 & 8.1 & 8.8 & 8.2 \\ \hline \end{array}$$

a) Graph the data.

b) Should the graph consist of scattered points or can the points be connected by a line? If the points can be connected by a line, then should the line be solid or dashed? Explain.

c) Does the graph show a relationship between height and mass? If so, describe it.

Katie asked 20 of her friends how they get to the park. She found that 9 walk, 4 ride a bicycle, 4 ride a skateboard, and 3 ride a car. Display Katie's data in pictograph in which one object represents two friends. Note that the friends who walk must be represented by $4\dfrac{1}{2}$ objects, and the friends who ride a car must be represented by $1\dfrac{1}{2}$ objects.