What could be done to try to halt desertification in this region?

For the vector $\mathbf{v}=(1,2,2)$, sketch $2 \mathbf{v}$.

A class had two sections. Section I had 55 students of whom 10 received A grades. Section II had 45 students of whom 11 received A grades. Now 1 of the 100 students is chosen at random, with each being equally likely to be chosen. $\mathbf{(a)}$ What is the probability that the student was in section I? $\mathbf{(b)}$ What is the probability that the student received an A grade? $\mathbf{(c)}$ What is the probability that the student received an A grade if the student is known to have been in section I? $\mathbf{(d)}$ What is the probability that the student was in section I if the student is known to have received an A grade?

Which words go in the blanks? Cuando hace calor, llevo ___________ y ____________. (camiseta / chaqueta / pantalón corto / bufanda)

The stage of sleep in which an EEG would detect the bursts of rhythmic activity known as sleep spindles is called a. REM sleep. b NREM-1. c. NREM-2. d. NREM-3. e. hypnagogic sleep.

The approximate metric measurement of length is given for a U.S. customary unit of length. Use your estimation skills to complete the graphic organizer below. Fill in each blank with foot, yard, inch, or mile.

$$\begin{matrix} \text{Metric} & \text{ } & \text{Customary}\\ \text{2.54 centimeters} & \text{}{\rightarrow} & \text{1}\\ \text{0.30 meter} & \text{}{\rightarrow} & \text{1}\\ \text{0.91 meter} & \text{}{\rightarrow} & \text{1}\\ \text{1.61 kilometers} & \text{}{\rightarrow} & \text{1}\\ \end{matrix}$$

Integrate with respect to x: $3 \cos \left(\frac{x}{2}\right)$

Find each value of

$$\theta$$

Round to the nearest degree.

$$\cos \theta = \frac { 1 } { 4 }$$

In contrast to the capital asset pricing model, arbitrage pricing theory: a. Requires that markets be in equilibrium. b. Uses risk premiums based on micro variables. c. Specifies the number and identifies specific factors that determine expected returns. d. Does not require the restrictive assumptions concerning the market portfolio.

Refer to the distribution of weights for infants by age and gender. In all cases you can assume that the weight distribution is approximately normal. The data for these exercises are taken from the 2000 clinical growth charts by the Centers of Disease Control and Prevention (CDC). The distribution of weights for 12-month-old baby girls has mean

$$\mu=9.7$$

kg and standard deviation

$$\boldsymbol { \sigma } = 1.0$$

kg. (a) Suppose that a 12-month-oId girl weighs 7.7 kg. Approximately what weight percentile is she in? (b) Suppose that a 12-month-old girl weighs 10.4 kg. Approximately what weight percentile is she in? (c) Suppose that a 12-month-old girl is in the 84th percentile in weight. Estimate her weight.

Find the flux of of F = xi + yj – zk across the part of the plane x + 2y + z = 8 in the first octant.

Identify three adaptations that helped amphibians leave water for life on land. 1. _____ 2. _____ 3. _____.

Identify the one angle that is not coterminal with all the others. 150°, 510°,-210° 450°, 870°.

Ecuadorian art You work at an art museum that is having an exhibit featuring Ecuadorian art. Describe the paintings on p. 245 and p. 255.Tell who painted each and how the painting reflects Ecuadorian culture. Also, give your impressions of each painting