The company reports that demand is still strong for the custom messenger bags made in San Francisco and that the new laptop bags sourced from China are receiving rave reviews. The additional business is allowing it to hire more people in all departments at the San Francisco headquarters, creating even more jobs locally.

Draw two diagrams, one depicting the supply chain for those products sourced in China and the other depicting the bags produced in San Francisco. Show all the major steps, including raw material, manufacturing, finished goods, distribution inventory, and transportation. Other than manufacturing cost, what other costs should Timbuk$2$ consider when making the sourcing decision?

A neutral-current coupling to a u quark can be pictured as a u quark emitting or absorbing a $Z^{0}$ and going on as a u quark with a different momentum. This is equivalent to a u and $\bar{u}$ quark annihilating to form a $Z^{0}$. Draw Feynman diagrams for both processes and state why they are equivalent. From the $u+\bar{u} \rightarrow Z^{0}$ point of view, the amplitude for the process will involve the wave functions for $u \bar{u}$. Similarly if $d_{c} \text { and } s_{c}$ are involved, the amplitude will be proportional to the sum $d_{c} \bar{d}_{c}+s_{c} \bar{s}_{c}$. Show that the strangeness-changing part of this amplitude vanishes because $\boldsymbol{s}_{c} \overline{\boldsymbol{s}}_{c}$ has been added to $d_{c} \bar{d}_{c} ; \text { i.e }$ show that the GIM mechanism works.

Write the letter for the correct definition of the italicized vocabulary word.

As soon as the race car came to a stop, the pit crew began to $bustle$ about, changing the tires, cleaning the windshield, and filling the tank.
(A) move busily
(B) sneak carefully
(C) walk casually
(D) remain in one place

Test the standard normal pseudo-random number generator on your computer by generating a sample of size 10,000 and drawing a normal quantile plot. How straight does the plot appear to be?

Two W10 $\times$ 100 steel beams are welded together to form an L-shaped member. If $L_1=6\ \mathrm{ft}$ and $L_2=8\ \mathrm{ft}$, determine the tension in the cables. (The beam weighs $100\ \mathrm{lb} / \mathrm{ft}$.)

For the two-span beams with distributed loading as shown, (a) determine $\theta_B$, the angle of rotation at $B$, and (b) determine the reactions $R_A, M_A$, and $R_B$. given

One end of a uniform meter stick is placed against a vertical wall. The other end is held by a lightweight cord that makes an angle $\theta$ with the stick. The coefficient of static friction between the end of the meter stick and the wall is 0.40. Let the angle $\theta$ be $15^{\circ}$ . A block of the same weight as the meter stick is suspended from the stick, as shown, at a distance x from the wall. What is the minimum value of x for which the stick will remain in equilibrium?

$Camera$ is to $photography$ as $printing$ $press$ is to______.

A pair of parametric equations is given. (a) Sketch the curve represented by the parametric equations. Use arrows to indicate the direction of the curve as t increases. (b) Find a rectangular-coordinate equation for the curve by eliminating the parameter.

$$x = \tan t , \quad y = \cot t , \quad 0 < t < \pi / 2$$

You are making a tabletop in the shape of a parallelogram to replace an old 24 inch by 15 inch rectangular one. You want the areas of the tabletops to be equal. The base of the parallelogram is 20 inches. What should the height be?

The ${ }^{235} \mathrm{U}$ isotope undergoes fission when bombarded with neutrons. However, its natural abundance is only $0.72$ percent. To separate it from the more abundant ${ }^{238} \mathrm{U}$ isotope, uranium is first converted to $\mathrm{UF}_6$, which is easily vaporized above room temperature. The mixture of the ${ }^{235} \mathrm{UF}_6$ and ${ }^{238} \mathrm{UF}_6$ gases is then subjected to many stages of effusion. Calculate how much faster ${ }^{235} \mathrm{UF}_6$ effuses than ${ }^{238} \mathrm{UF}_6$.

Solve the open sentence. Then graph the solution set. $|3 k+4| \geq 8$

Let A represent the point with coordinates (-1,16), and let B represent the point with coordinates (5,-8).

Find the coordinates of the midpoint M of the line segment connecting points A and B.

a. What is a fossil? b. In general, how does a fossil form? c. Which parts of an organism are most likely to be preserved as fossils? Why?