Look at the characters motives you recorded in your Q ACADCA's NOTEBOOK. Compare Lily and Tom's motives for finding a bit of sunlight with those of Mr. Noakes.

If n is an integer, $n \cdot 180^{\circ}$ represents an integer multiple of $180^{\circ}$, $(2 n+1) \cdot 90^{\circ}$ represents an odd integer multiple of $90^{\circ}$, and so on. Decide whether each expression is equal to 0, 1, -1, or is undefined. $\sin \left[270^{\circ}+n \cdot 360^{\circ}\right]$

Consider a radar system in an air traffic control center that is monitoring the distance to an approaching airplane. If the airplane is $4.0 \mathrm{~km}$ from the control center, what is the time delay between a transmitted wave pulse and the return of the reflected pulse?

A 3 kg block measures 5 cm by 10 cm by 20 cm. When it slides on a 10 cm by 20 cm face, it moves with constant speed when pulled horizontally by a force whose magnitude is 3 N. How big a horizontal force must be applied to pull it with constant speed if it slides on a 5 cm by 20 cm face?

A patient who has been isolated for Clostridium dif icile (C. dif icile) asks you to explain what he should know about this organism. What is the most appropriate information to include in patient teaching? (Select all that apply.)

1. The organism is usually transmitted through the fecal-oral route.
2. Hands should always be cleaned with soap and water versus alcohol-based hand sanitizer.
3. Everyone coming into the room must be wearing a gown and gloves.
4. While the patient is in contact precautions, he cannot leave the room.
5. C. dif icile dies quickly once outside the body.

a. Why does beta radiation penetrate farther into body tissue than alpha radiation?

b. How does radiation cause damage to cells of the body?

c. Why does the radiation technician leave the room when you receive an X-ray?

d. What is the purpose of wearing gloves when handling radioisotopes?

Is the wavelength of the radiation that excites a fluorescent material greater than, less than, or equal to the wavelength of the radiation the material emits? Explain.

(a) How is Uncle Marcos's reality different from that of the narrator and other characters?

(b) Which reality do you think is truer? Defend your answers.

(a) Which characters treat Wart differently at the end of the story? Why?

(b) How do the responses of others help define the role of a hero?

In division you can sometimes simplify the problem by multiplying or dividing both the divisor and dividend by the same number. This is called division compensation. For example,

$$\begin{aligned} &72 \div 12=(72 \div 2) \div(12 \div 2)=36 \div 6=6 \text { and } \\ &145 \div 5=(145 \times 2) \div(5 \times 2)=290 \div 10=29 \end{aligned}$$

Calculate the following mentally using this technique.

b. $234 \div 26$

In division you can sometimes simplify the problem by multiplying or dividing both the divisor and dividend by the same number. This is called division compensation. For example,

$$\begin{aligned} &72 \div 12=(72 \div 2) \div(12 \div 2)=36 \div 6=6 \text { and } \\ &145 \div 5=(145 \times 2) \div(5 \times 2)=290 \div 10=29 \end{aligned}$$

Calculate the following mentally using this technique.

d. $168 \div 14$

Use inductive reasoning to predict the next line in each sequence of computations. Then use a calculator or perform the arithmetic by hand to determine whether your conjecture is correct.

$$\begin{array} { r } { 1 + 2 = \frac { 2 \times 3 } { 2 } } \\ { 1 + 2 + 3 = \frac { 3 \times 4 } { 2 } } \\ { 1 + 2 + 3 + 4 = \frac { 4 \times 5 } { 2 } } \\ { 1 + 2 + 3 + 4 + 5 = \frac { 5 \times 6 } { 2 } } \end{array}$$

In what way does a magnetosome control the movement of magnetotactic bacteria? (Section 14.23)

(a) What is the genetic relationship between a population of clones? (b) Explain the effect of this in relation to the population adapting to environment change: