Give the oxidation number of manganese in the following:
(a) $\mathrm{MnO}_4{ }^{2-}$

What is the least common multiple of $10$ and $16$?

Remember to use the largest common factor and to check by multiplying. Factor out a negative factor if the first coefficient is negative.

$$x^3+6 x^2$$

A man sits in a seat that is hanging from a rope. The rope passes over a pulley suspended from the ceiling, and the man holds the other end of the rope in his hands. What is the tension in the rope, and what force does the seat exert on him? Draw a free-body force diagram for the man.

Give the oxidation number of nitrogen in the following:
(d) $\mathrm{HNO}_2$

Factor: $-5 y^2-10 y$ Remember to use the largest common factor and to check by multiplying. Factor out a negative factor if the first coefficient is negative.

In what ways are cycloalkanes different from aromatic compounds?

In each sentence below, a modifier is underlined. If the form of the modifier is incorrect, write the correct form above it. If it is already correct, write $C$ above it. Example 1. When he got up, Benjamin felt $\underline{\text{badder}}$ (worse) than when he had gone to bed.

15. The only thing worser for a picnic than rain is an invasion of ants

On the lines provided, rewrite the following sentences, correcting any inexact pronoun references. If a sentence is already correct, write C on the line.

Example 1. On the sign outside the store, it said “No dogs allowed.”

$$\underline{\color{#c34632}\text{The sign outside the store said “No dogs allowed.”}}$$

Even though rain was predicted, it didn’t stop them from counting on this picnic. ___________________________________________________________________________________________________________________________________________

Your ears "pop" when you change altitude quickly-such as during takeoff or landing in an airplane, or during a drive in the mountains. Curiously if you are a passenger in a high-speed rain, your ears sometimes pop as the speed of the train increases rapidly-even though there is little or no change in altitude. Explain.

Callaway Golf Company has determined that the marginal cost C of manufacturing x Big Bertha golf clubs may be expressed by the quadratic function $C(x)=4.9 x^{2}-617.4 x+19,600.$ (a) How many clubs should be manufactured to minimize the marginal cost? (b) At this level of production, what is the marginal cost?

Mark received a 3.5% salary increase. His salary after the raise was $36,432. What was his salary before the raise?

Mr. Brown's present salary is $36,500. He is getting an increase of 7% in his salary next year. What will the new salary be?

Contrast the compounds angiotensinogen and angiotensin in terms of enzyme activity.