Solve the following for $a$ :

$$4 a+4=40$$

Ask two of your friends (not in this class) to define the terms in the problem (Write a one-sentence definition for each of the following: a. chemistry b. chemical) Do their answers agree with the definitions you gave?

Write a one-sentence definition for the following: chemical

Write a one-sentence definition for the following: chemistry

A collection of coins contains 11 nickels, 5 quarters, and 7 dimes. What is the percentage of dimes in the collection? Express your answer to the ones place.

An alloy contains $56 \mathrm{~g}$ of pure silver and $22 \mathrm{~g}$ of pure copper. What is the percentage of silver in the alloy? Express your answer to the ones place.

A clinic had 25 patients on Friday morning. If 21 patients were given flu shots, what percentage of the patients received flu shots? Express your answer to the ones place.

Evaluate the following:

$$\frac{-56}{8}=$$

Evaluate the following:

$$34+(-55)=$$

Evaluate the following:

$$-11-(-9)=$$

Evaluate the following:

$$4 \times(-2)+6=$$

Evaluate the following:

$$-8+(-22)=$$

Evaluate the following:

$$15-(-8)=$$

What is the place value for the bold digit? 46.1000