Add commas where necessary. Delete ( ) unnecessary commas. Sentence may be correct.
The last day of band camp is Friday,August 3.

What are the pros and cons of using electrochemistry as a source of energy?

The sentences below are incorrect. Make each sentence correct by replacing the italicized word or phrase with a term from the Study Guide.

Correlation is the change in species over time.

Jeremy runs 7 miles per week and increases his distance by 1 mile each week. Tony runs 3 miles per week and increases his distance by 2 miles each week. In how many weeks will Jeremy and Tony be running the same distance? What will that distance be? _

A random variable represents the number of heads in ten tosses of a coin. (A) Find the mean and standard deviation of the random variable. (B) Use a graphing calculator to simulate 200 repetitions of the binomial experiment, and compare the mean and standard deviation of the numbers of heads from the simulation to the answers for part (A).

The _______ leader threatened to attack a neighboring country. a. contradictory b. haggled c. belligerent d. chided

By considering only the six $\mathrm{CO}$ groups in $\mathrm{Gr}(\mathrm{CO})_6\left(\mathrm{O}_{\mathrm{h}}\right)$, sketch diagrams to represent the $A_{1 g}, E_g$ and $T_{1 u}$ stretching modes. Use the $O_{\mathrm{h}}$ character table to deduce which modes are IR active. [Ans. See Fig. 3.18; each $\mathrm{C}-\mathrm{O}$ acts in the same way as an $\mathrm{S}-\mathrm{F}$ bond]

For a band camp, you can choose two or three roommates from a group of 25 friends. In how many ways can you choose?

David no se siente bien y va la oficina de la enfermera de la escuela. Complete este diálogo con las formas apropiadas de estar.

DAVID: No. Mi padre __________ trabajando y mi madre _________ visitando a mis abuelos porque mi abuelo __________ en el hospital.

Write a short response to this question.

What is the name of a type of fossil that can be used to establish the age of rock? Directions (7-10): Read the passage below. Then, answer the questions on a separate sheet of paper.

find the center cord of triangle EFG with vertices at E (-5,5), F (-1,3) and G (-3,1).

Replace the underlined phrase with the correct vocabulary term from the Study Guide.

$\underline{\text{Soil}}$ is the residue of rock material left behind after the ore is removed.

A very fast-moving train car passes you, moving to the right at $0.50 c$. You measure its length to be $12 \mathrm{~m}$. Your friend David flies past you to the right at a speed relative to you of $0.80 \mathrm{c}$. How long does David measure the train car to be?

Complete the following statements:
The umbilical cord contains three blood vessels, two of which are ___________