14. Endangered Species

The chart below shows the numbers of endangered and threatened species both in the United States and abroad.

\begin{tabular}{|c|c|c|c|c|}
\hline
& \multicolumn{2}{|c|}{Endangered} & \multicolumn{2}{|c|}{Threatened} \\
\hline
& \begin{tabular}{l} United \\ States \end{tabular} & Foreign & \begin{tabular}{l} United \\ States \end{tabular} & Foreign \\
\hline
Mammals & 68 & 251 & 10 & 20 \\
\hline
Birds & 77 & 175 & 13 & 6 \\
\hline
Reptiles & 14 & 64 & 22 & 16 \\
\hline
Amphibians & 11 & 8 & 10 & 1 \\
\hline
\end{tabular}

Source: www.infoplease.com

To analyze the given data on endangered and threatened species in the United States and abroad, we'll summarize the data in several categories.

### Step-by-Step Solution

#### Step 1: Categorize and Sum Endangered Species in the United States
First, we sum the numbers of endangered species in the United States across different categories (mammals, birds, reptiles, amphibians).

- Endangered mammals: 68
- Endangered birds: 77
- Endangered reptiles: 14
- Endangered amphibians: 11

Total endangered species in the United States:
[tex]\[ 68 + 77 + 14 + 11 = 170 \][/tex]

#### Step 2: Categorize and Sum Endangered Species Abroad
Next, we sum the numbers of endangered species abroad across the same categories.

- Endangered mammals: 251
- Endangered birds: 175
- Endangered reptiles: 64
- Endangered amphibians: 8

Total endangered species abroad:
[tex]\[ 251 + 175 + 64 + 8 = 498 \][/tex]

#### Step 3: Categorize and Sum Threatened Species in the United States
We then sum the numbers of threatened species in the United States.

- Threatened mammals: 10
- Threatened birds: 13
- Threatened reptiles: 22
- Threatened amphibians: 10

Total threatened species in the United States:
[tex]\[ 10 + 13 + 22 + 10 = 55 \][/tex]

#### Step 4: Categorize and Sum Threatened Species Abroad
Similarly, sum the numbers of threatened species abroad.

- Threatened mammals: 20
- Threatened birds: 6
- Threatened reptiles: 16
- Threatened amphibians: 1

Total threatened species abroad:
[tex]\[ 20 + 6 + 16 + 1 = 43 \][/tex]

#### Step 5: Sum Total Endangered and Threatened Species in the United States
Now, we calculate the overall total of endangered and threatened species in the United States.

- Total endangered species in the United States: 170
- Total threatened species in the United States: 55

Total species in the United States:
[tex]\[ 170 + 55 = 225 \][/tex]

#### Step 6: Sum Total Endangered and Threatened Species Abroad
Finally, we calculate the overall total of endangered and threatened species abroad.

- Total endangered species abroad: 498
- Total threatened species abroad: 43

Total species abroad:
[tex]\[ 498 + 43 = 541 \][/tex]

### Summary of Results
- Total endangered species in the United States: 170
- Total endangered species abroad: 498
- Total threatened species in the United States: 55
- Total threatened species abroad: 43
- Total species (endangered + threatened) in the United States: 225
- Total species (endangered + threatened) abroad: 541

These results give us a detailed breakdown of the endangered and threatened species both in the United States and abroad.