If the sun expanded to a radius 100 times its present radius, what would its density be? (Hint: The volume of a sphere is $\frac{4}{3} \pi R^3.)$

A car is traveling at 80 feet per second (approximately 55 miles per hour) and slows down as it passes through a busy inter section. The car's velocity is shown in the following table.

$$\begin{array}{c|c|c|c|c|c|} \hline \text { Time since brakes applied (seconds) } & {0} & {3} & {6} & {9} & {12} \\ \hline \text { velocity (ft/sec) } & {80} & {62} & {47} & {32} & {22} \\ \hline \end{array}$$

Use a left sum to approximate the total distance the car has traveled over the 12 second interval.

Use the proportional reasoning to make a prediction. Of 200 radio-controlled cars that were manufactured by one company, 3 were defective. The company manufactures 1000 cars each day. About how many defective cars would you predict are produced each day?

Lee las frases y complétalas con el antónimo de la palabra señalada. Escoge el antónimo del recuadro y escríbelo en la forma correcta según la frase. Recuadro: comenzar; de prisa; dormido; muerto; se murieron; subir.

Sus peces no están vivos, están ____.

¿Qué vas a hacer, ____ o bajar la escalera?

No puede terminar el trabajo porque primero tiene que ____ el trabajo.

Los gatos no están despiertos. Están ___.

La señorita no está caminando lentamente. Está caminando ____.

En el artículo dice que tres personas nacieron y tres personas ___ en el hospital ayer.

Calculate $1 \frac{7}{15} \div 1 \frac{11}{25}$ by multiplying by the reciprocal.

In the following sentence, identify the underlined pronouns by writing above each one PER for personal, REF for reflexive, INTEN for intensive, DEM for demonstrative, INTER for interrogative, REL for relative, or IND for indefinite.

$\underline{\text{Those}}$ are the pilots whom the general $\underline{\text{himself}}$ chose for the mission.

Find the orbital radius that corresponds to a "year" of 150 days.

Congratulations! You discover a new element you name wyzzlebium $(\mathrm{Wz})$. The average atomic mass of $\mathrm{Wz}$ was found to be $303.001\mathrm{~amu}$, and its atomic number is 120 .

(a) If the masses of the two isotopes of wyzzlebium are $300.9326\mathrm{~amu}$ and $303.9303\mathrm{~amu}$, what is the relative abundance of each isotope?
(b) What are the isotopic notations of the two isotopes?
(c) How many neutrons are in one atom of the more abundant isotope?

A spherical balloon is inflated with helium at the rate of 100π ft³/min. How fast is the balloon's radius increasing at the instant the radius is 5 ft? How fast is the surface area increasing?

Is a radius a chord? Is a diameter a chord? Explain your answers.

Complete each statement. A tangent is ___ to the radius drawn to the point of tangency.

In each of the following sentence, identify the underlined pronouns by writing above each one PER for personal, REF for reflexive, INTEN for intensive, DEM for demonstrative, INTER for interrogative, REL for relative, or IND for indefinite.

Oh, $\underline{\text{this}}$ is $\underline{\text{some}}$ of that delicious tuna salad.

Poor blood circulation causes _____ hypoxia.
a. ischemic
b. histotoxic
c. hemolytic
d. anemic
e. hypoxemic

The following assignment statements either contain at least one error, or could be improved in some way. Assume that radius is a variable that has been initialized. First, identify the problem, and then fix and/or improve them:

33 =number
my variable = 11. 11;
area = 3. 14 * radius ^2;
x = 2 * 3. 14 * radius;