James McDonnell purchases $800$ pounds of potatoes at a cost of $\$0.18$ per pound. If he anticipates a spoilage rate of $20\%$ of the potatoes and wishes to make a profit of $140\%$ of the cost, for how much must he sell the potatoes per pound?

What two factors are most responsible for limiting life in a particular area?

A. sunlight and temperature

B. precipitation and temperature

C. precipitation and sunlight

D. soil conditions and precipitation

Perform the indicated operations. $(x-1)(x+2)(x-3)$

Some of the following possessives are correct, and others are not. On the lines provided, revise those that are incorrect. If a possessive is already correct, write C on the line.

Example 1. Jane and Ellen’s bicycles $\underline{\color{#c34632}{Jane’s ~and~ Ellen’s ~bicycles}}$

James’ garden _______________________________________________

Graph some curves of constant temperature (“isotherms”) and indicate directions of heat flow by arrows when the temperature equals (a) x³-3xy², (b) sin x sinh y, and (c) e^x cos y.

The formula $C=\frac{5}{9}(F-32)$, where $F \geq-459.7$, represents the Celsius temperature $C$ as a function of the Fahrenheit temperature $F$.

Find the inverse function of $C$.

Bicycling World, a magazine devoted to cycling, reviews hundreds of bicycles throughout the year. Its Road-Race category contains reviews of bicycles used by riders primarily interested in racing. One of the most important factors in selecting a bicycle for racing is its weight. The following data show the weight (pounds) and price ($) for ten racing bicycles reviewed by the magazine:$

$$\begin{array}{lcc} \text { Model } & \text { Weight (lbs) } & \text{ Price (\$) } \\ \text { Fierro 7B } & 17.9 & 2200 \\ \text { HX 5000 } & 16.2 & 6350 \\ \text { Durbin Ultralight } & 15.0 & 8470 \\ \text { Schmidt } & 16.0 & 6300 \\ \text { WSilton Advanced } & 17.3 & 4100 \\ \text { bicyclette vélo } & 13.2 & 8700 \\ \text { Supremo Team } & 16.3 & 6100 \\ \text { XTC Racer } & 17.2 & 2680 \\ \text { D'Onofrio Pro } & 17.7 & 3500 \\ \text { Americana \#6 } & 14.2 & 8100 \end{array}$$

$

Develop a scatter chart with weight as the independent variable. What does the scatter chart indicate about the relationship between the weight and price of these bicycles?

An aluminum rod $2.0 \mathrm{~cm}$ in diameter and $12 \mathrm{~cm}$ long protrudes from a wall that is maintained at $250^{\circ} \mathrm{C}$. The rod is exposed to an environment at $15^{\circ} \mathrm{C}$. The convection heat-transfer coefficient is $12 \mathrm{~W} / \mathrm{m}^2 \cdot{ }^{\circ} \mathrm{C}$. Calculate the heat lost by the rod.

Determine the isotherms (curves of constant temperature T) of the temperature fields in the plane given by the following scalar function. Sketch some isotherms.

$$T=x^2-y^2+8 y$$

Perform the indicated operations.

$$(2 w-6)+(3 w+4)$$

Be sure to show all calculations clearly and state your final answer in complete sentences.
One Born Every Minute? It’s possible to make a rough estimate of how often planetary systems form by making some basic assumptions. For example, if you assume that the stars we see have been born at random times over the last 10 billion years, then the rate of star formation is simply the number of stars we see divided by 10 billion years. The fraction of stars with detected extrasolar planets is at least 5%, so this factor can be multiplied in to find the approximate rate of formation of planetary systems.
a. Using these assumptions, estimate how often a planetary system forms in our galaxy. (Our galaxy contains at least 100 billion stars.)
b. How often does a planetary system form somewhere in the observable universe, which contains at least 100 billion galaxies?
c. Write a few sentences describing your reaction to your results. Do you think the calculations are realistic? Are the rates larger or smaller than you expected?

Say whether the following places are located in the area where you live. If so, you may want to give the name of the place.

1. restaurant

2. cinéma

3. église

4. centre commercial

5. biblioth$\`{e}$que

6. café

7. plage

8. supermarché

9. hopital

10. parc

11. stade

12. musée

13. hotel

14. piscine

15. theatre

The power series representation of a function f is $\sum_{k=0}^{\infty} \frac{x^{k}}{k !}$. Then the power series for $f^{\prime}(x)$ is $\sum_{k=1}^{\infty} \frac{x^{k-1}}{(k-1) !}$, (B) $\sum_{k=0}^{\infty} \frac{x^{k}}{(k+1) !}$, (C) $\sum_{k=1}^{\infty} \frac{k x^{k-1}}{(k+1) !}$, (D) $\sum_{k=1}^{\infty} \frac{k \cdot x^{k-1}}{(k-1) !}$.

A high-speed aircraft is cruising in still air How does the temperature of air at the nose of the aircraft duter from the temperature of air at some distance from the aircraft?