Read the following questions. On a separate piece of paper, write the best possible answer for each one. An RFID tag makes it possible to read all the items in a cart simultaneously while they are all still in the cart. T F

As $t$ increases, the ellipse given by the parametric equations

$$x=\cos t \text { and } y=2 \sin t$$

is traced out counterclockwise. Find a parametric representation for which the same ellipse is traced out clockwise.

The typical human adult uses about $160 \mathrm{~g}$ of glucose per day, $120 \mathrm{~g}$ of which is used by the brain. The available reserve of glucose ($20 \mathrm{~g}$ of circulating glucose and $\sim 190 \mathrm{~g}$ of glycogen) is adequate for about one day. After the reserve has been depleted during starvation, how would the body obtain more glucose?

Some airline tickets have a 15-digit identification number a₁a₂ . . . a₁₅ where a₁₅ is a check digit that equals a₁a₂ . . . a₁₄ mod 7. Which errors in a single digit of a 15-digit airline ticket identification number can be detected?

Refer to the information in the third exercise of this chapter and assume the periodic inventory system is used. Determine the costs assigned to ending inventory and to cost of goods sold using (a) specific identification. (Round per unit costs and inventory amounts to cents.) For specific identification, ending inventory consists of 200 units, where 180 are from the January 30 purchase, 5 are from the January 20 purchase, and 15 are from beginning inventory.

Draw the region bounded by the curves. Then, find the volume when the region is rotated around the y-axis.

$$y=3 x^{2}, x=0, \text { and } y=3$$

A. What are the three major tools of the Federal Reserve System? B. What would the Fed do with each tool to increase the money supply? Explain for each.

An FM radio signal with frequency $98.1 \mathrm{MHz}$ and speed $c=3.00 \times 10^8 \mathrm{~m} / \mathrm{s}$ has wavelength (a) $33 \mathrm{~m}$; (b) $3.1 \mathrm{~m}$; (c) $1.0 \mathrm{~m}$; (d) $0.33 \mathrm{~m}$.

Find the area of the following region. The region inside the rose $r=4 \sin 2 \theta$ and inside the circle r = 2

Solve. Use any method. Also, determine whether the system is consistent or inconsistent and whether the equations are dependent or independent.

$3 x+2 y=1$,

$$2 x-y=-11$$

A person who deposits money in a bank account starts a long process described by the reserve-deposit ratio, r. For every dollar deposited, the bank keeps r dollars and lends 1-r dollars to someone else, who deposits the loan in a bank account. The same fraction of the second deposit is loaned out, to be deposited in turn, and so on. If the initial deposit is N dollars, find the total value of the bank accounts generated by this deposit: After the third deposit.

An automobile engine can produce 200 N $\cdot$ m of torque. Calculate the angular acceleration produced if 95.0% of this torque is applied to the drive shaft, axle, and rear wheels of a car, given the following information. The car is suspended so that the wheels can turn freely. Each wheel acts like a 15.0 kg disk that has a 0.180 m radius. The walls of each tire act like a 2.00-kg annular ring that has inside radius of 0.180 m and outside radius of 0.320 m. The tread of each tire acts like a 10.0-kg hoop of radius 0.330 m. The 14.0-kg axle acts like a rod that has a 2.00-cm radius. The 30.0-kg drive shaft acts like a rod that has a 3.20-cm radius.

10 Hz is the natural frequency of a spring-mass system. The frequency changes by 45% when the spring constant is lowered by 800 N/m. Find the original system's mass and spring constant.

On the schematic symbol of a pnp transistor, a. the arrow points out on the emitter lead. b. the arrow points out on the collector lead. c. the arrow points in on the base lead. d. the arrow points in on the emitter lead.