(a) How did Earth come to be destroyed? (b) What suggestions do you think Clarke might have offered today to prevent a situation like this from occurring in the future? Cite details from the story to support your response.

How do cellulose, starch, and glycogen differ? Describe the function of each.

Draw two lines under each simple predicate in the main clause. Write the verb tense: present perfect, past perfect, or future perfect.
_____Before next week, Ms. Rashad will have corrected over one hundred themes.

Is the plant density of a species related to the altitude at which data are collected? Let Y denote the species density and X denote the altitude. A fit of a simple linear regression model using 14 observations yielded

$$\hat { y } = 21.6 - 7.79 x \text { and } r ^ { 2 } = .61$$

. What is the value of the correlation coefficient r?

Which of the following species would you expect to possess metallic properties, Explain.

$\mathrm{NiCo}$ alloy

One of the biggest problems for students when doing probability problems is deciding which formula or formulas to use. Another problem is deciding whether two events are independent or dependent. Use the following problem to help develop a better understanding of these concepts.

Assume you are given a five-question multiple-choice quiz. Each question has 5 possible answers: A, B, C, D, and E. Assume that you are given a five-question matching test in which you are to match the correct answers in the right column with the questions in the left column. You can use each answer only once.

5. How many events are there?

Four coins are tossed. How many simple events are in the sample space?

Why did Otto Von Bismarck believe a war with France would help unify Germany?

What are disjoint events?

For each of the following scenarios, indicate whether a long-term asset has been impaired (Y for yes and N for no) and, if so, the amount of the loss that should be recorded.

$$\begin{array}{lccccc} \hline \text { Asset } & \text { Book Value } & \begin{array}{c} \text { Estimated Future } \\ \text { Cash Flows } \end{array} & \text { Fair Value } & \begin{array}{c} \text { Impaired? } \\ \text { (Y or N) } \end{array} & \begin{array}{c} \text { Amount } \\ \text { of Loss } \end{array} \\ \hline \text { a. } \text { Equipment } & \$ 180,000 & \$ 140,000 & \$ 100,000 & & \\ \text { b. } \text { Trademark } & \$ 320,000 & \$ 460,000 & \$ 375,000 & & \\ \text { c. } \text { Land } & \$ 52,000 & \$ 24,000 & \$ 21,000 & & \\ \text { d. } \text { Factory building } & \$ 9 \text { million } & \$ 9 \text { million } & \$ 7 \text { million } & & \\ \hline \end{array}$$

Use a table to list the significant events of each year from $1914$ to $1918$.

Last month, Willsted Company sold 450 units for $25 each. During the month, fixed costs were$2,520 and variable costs were $7 per unit.

Required:

1. Determine the unit contribution margin and contribution margin ratio.
2. Calculate the break-even point in units and sales dollars.
3. Compute Willsted’s margin of safety in units and as a percentage of sales.

Consider an inclined plane (i.e., ramp), and assume it is covered with a layer of ice so that it is extremely slippery (frictionless). The horizontal surface of the bottom is not covered with ice, however. A box is released from the same height on the ramp for a number of trials and slides down the ramp. For each trial, the box encounters a different horizontal surface at the bottom of the smooth ramp. Draw qualitative plots to compare the velocity as a function of time for each case: (a) a grass field, (b) an asphalt street, (c) a hardwood floor, (d) an ice rink, and (e) an ideal, frictionless surface.

Give two examples of a pH indicator.