The bus driver was surprised when her first passenger asked her to turn the music down, because she thought the volume was fine. When the passenger said something, though, the driver realized the sound was too loud. The bus driver’s initial indifference to the volume can best be understood because a. the volume was below her absolute threshold. b. the driver had a decreased ability to determine the music’s pitch. c. the just noticeable difference of the music was too great. d. the driver had adapted to the volume of the music. e. the driver was using bottom-up processing instead of top-down processing.

Because of weather conditions, a bus driver reduced the usual speed along a $165$-mile bus route by $5 \mathrm{~mph}$. The bus arrived only $15 \mathrm{~min}$ later than its usual arrival time. How fast does the bus usually travel?

Which of the following statements is most typical of the approach of a cognitive therapist? a. "Let's go back to your statement about your happiness as a child". b. "When you say 'No one likes me that's illogical, because you ave close friends". c. "What a hear you saying is you are angry, and can hear the frustration in your voice". d. "I'm going to start teaching you to relax, and then we will slowly deal with your phobia". e. "I think that prescribing you an SSRI will increase your positive mood over the next few weeks".

As a school bus approaches a stop sign, the driver applies the brakes and bring s the bus to a slow, gradual stop. If the driver had instead stomped on the brakes and brought the bus to a sudden stop, would the magnitude of the impulse be greater than, less than, or equal to the magnitude of the impulse with the gradual stop? Explain.

Dr. Warren is testing the link between the consumption of caffeine and a person’s memory. She randomly divides 300 participants into three groups and gives each participant an energy drink to consume. Some of the drinks have high levels of caffeine, some have medium amounts, and some have none at all—but they all taste the same. About 30 minutes later, she has the participants play a memory game on the computer where they have to match faces and names together. At the end of the game, the computer thanks them for playing, and their scores are sent to Dr.Warren’s lab. The dependent variable in the experiment is a. how quickly the participants matched the names and faces. b. the participants’ scores from the memory game. c. the amount of caffeine they consumed. d. their explanations about how they played the game. e. the amount of caffeine they consume in a typical week.

What are the correct preterite forms of the verbs? Tú _____ (comer) papas fritas.

Many residents of Oakwood, a small town, have asked to have the town’s swimming pool kept open for eight hours each day during the summer instead of only six hours. The cost of operating the pool is $80 per hour. Draw a graph that shows the efficient level of swimming-pool hours per day to be eight hours. The marginal cost should be shown by a horizontal line that hits the vertical axis at$80. The sum of the marginal benefit or demand curve should slope downward from left to right and intersect the marginal cost above eight hours of daily operation. Explain how your graph demonstrates that this is the optimal quantity of this public good.

For each of $y=\sin x, \quad y=\sin 2 x, \quad y=\sin \left(\frac{1}{2} x\right)$ record the maximum and minimum values and state the period and amplitude.

A bus is moving at 25 m/s when the driver steps on the brakes and brings the bus to a stop in 3.0 s. What is the average acceleration of the bus while braking?

A police officer who asks a witness to recall details about someone suspected of a crime would be asking the witness to a. listen to recordings of several voices to determine if the suspect’s voice is detected. b. select the suspect from a visual lineup of several similar people. c. describe the suspect’s physical qualities to a police sketch describe the suspect’s physical qualities to a police sketch artist. d. determine if the suspect’s motive for the shooting seems believable. e. imagine a scenario in which the suspect could have acted in self-defense.

For the given functions f and g, find the following. $(f+g)(3); f(x)=x-1 ; g(x)=2 x^{2}$

A police officer questions a child who was an eyewitness to a crime. The officer is most likely to get accurate information if she: a. first tells the child all about the crime the way she thinks it unfolded. b. uses neutral, age appropriate words and is the first to interview the child. c. uses neutral, age appropriate words and is the last to interview the child. d. uses suggestive techniques to get the story from the child. e. tells the child a story about a similar crime to get the child thinking about possibly similar details.

When a person performs a heroic act solely for public praise she is on which developmental level according to Lawrence Kohliberg. a. Preconventional. b. Postconventional. c. Conventional. d. Concrete operational. e. Formal operational.

For linear transformation $T:\Bbb{R}^n\rightarrow\Bbb{R}^m, T(x,y)=(x+2y,x-2y,y)$, determine the standard matrix $\textbf{A}$ such that $T(\overrightarrow{\textbf{v}})=\textbf{A}\overrightarrow{\textbf{v}}$.