A retail store has various sizes of television sets made by the same manufacturer. The price for a set is a function of the screen size, measured in inches along the diagonal. The prices are listed here.

x (in.)	p(x) (dollars)
2	160
5	100
7	120
12	250
17	220
21	200
27	340
32	680
35	1100

Make a scatter plot of the data. Based on the scatter plot, explain why a quartic function is a more appropriate mathematical model than a cubic function.

Evaluate each sum that exists.

$$\sum_{i=1}^7(-1)^{i-1}$$

Determine whether the decimal is terminating or repeating. 5.692

Describe the relationship between the values of the independent and dependent variables.

What is $36 \frac{1}{2} \%$ as a decimal?

Es el Año Nuevo y Ud. está trabajando en una emisora de televisión. Ud. está describiendo cómo las personas están pasando la noche en un restaurante popular. Complete las frases siguientes usando el gerundio de uno de los verbos dados (cada verbo debe usarse solamente uno vez).

comenzar                      divertirse     caer                                  tirar     tocar                                comer     celebrar                          cantar     besar                                bailar

Muchas personas siguen _______________________ serpentinas.

The thermal efficiency of a reversible power cycle operating between hot and cold reservoirs is $20 \%$. Evaluate the coefficient of performance of (a) a reversible refrigeration cycle operating between the same two reservoirs. (b) a reversible heat pump cycle operating between the same two reservoirs.

Find $\lim _{x \rightarrow-1} \dfrac{x^2-x-2}{x^2+4 x+3}$, if it exists.

Solve. If no solution exists, state this.

$$\dfrac{t}{10}+\dfrac{t}{15}=1$$

A household appliance manufacturer wants to analyze the relationship between total sales and the company's three primary means of advertising (television, magazines, and radio). All values were in millions of dollars. They found the regression equation

$\widehat{\text{Sales}}$ = 250 + 6.75 TV + 3.5 Radio + 2.3 Magazines.

One of the interpretations below is correct. Which is it? Explain what's wrong with the others.

Every million dollars spent on radio makes sales increase $3.5 million, all other things being equal.

Write as a decimal.

$5 \frac{1}{4}$%

Lee y decide si estas afirmaciones sobre el año 1850 son ciertas (C) o falsas (F) 1.En el año 1850, la gente viajaba en tren, en barco o a caballo. 2.La gente veía programas de televisión y escuchaba la radio. 3.Había luces de gas para iluminar las calles. 4.Los chicos hablaban por teléfono con sus amigos. 5.No había teléfonos celulares.

What's the difference between an independent variable and a dependent variable?

State the domain and range of the function.

$$f(x)=-2cos3x$$