Question
This passage describes shell color in grove snails.
a grove snail with a dark-colored shell
Some grove snails have light-colored shells, and others have dark-colored shells. Dark-colored shells absorb more light, so they heat up in the sun more easily than light-colored shells do.
Snails are more likely to survive when they are not too hot or too cold. So, grove snails that live in shady places tend to have dark-colored shells, and grove snails that live in sunny places tend to have light-colored shells.
The table below describes a possible population of grove snails at the start of a period of time and at the end of that period. The table shows shell color in the population at each point in time.
Complete the table. Write the exact answers as whole numbers or decimals.
Data about a population of grove snails
Point in time Number with light-colored shells Number with dark-colored shells Percentage with light-colored shells Percentage with dark-colored shells
Start 55 445
%
%
End 399 351
%
%
a grove snail with a dark-colored shell
Some grove snails have light-colored shells, and others have dark-colored shells. Dark-colored shells absorb more light, so they heat up in the sun more easily than light-colored shells do.
Snails are more likely to survive when they are not too hot or too cold. So, grove snails that live in shady places tend to have dark-colored shells, and grove snails that live in sunny places tend to have light-colored shells.
The table below describes a possible population of grove snails at the start of a period of time and at the end of that period. The table shows shell color in the population at each point in time.
Complete the table. Write the exact answers as whole numbers or decimals.
Data about a population of grove snails
Point in time Number with light-colored shells Number with dark-colored shells Percentage with light-colored shells Percentage with dark-colored shells
Start 55 445
%
%
End 399 351
%
%
Answers
GPT-4o mini
To complete the table, we need to calculate the percentages of grove snails with light-colored shells and dark-colored shells at both the start and end of the period based on the provided numbers.
**At the Start:**
- Number with light-colored shells = 55
- Number with dark-colored shells = 445
- Total number of snails = 55 + 445 = 500
**Calculating percentages:**
1. Percentage with light-colored shells:
\[
\text{Percentage with light-colored shells} = \left(\frac{55}{500}\right) \times 100 = 11\%
\]
2. Percentage with dark-colored shells:
\[
\text{Percentage with dark-colored shells} = \left(\frac{445}{500}\right) \times 100 = 89\%
\]
**At the End:**
- Number with light-colored shells = 399
- Number with dark-colored shells = 351
- Total number of snails = 399 + 351 = 750
**Calculating percentages:**
1. Percentage with light-colored shells:
\[
\text{Percentage with light-colored shells} = \left(\frac{399}{750}\right) \times 100 = 53.2\%
\]
2. Percentage with dark-colored shells:
\[
\text{Percentage with dark-colored shells} = \left(\frac{351}{750}\right) \times 100 = 46.8\%
\]
Now we can fill out the table:
| Point in time | Number with light-colored shells | Number with dark-colored shells | Percentage with light-colored shells | Percentage with dark-colored shells |
|---------------|----------------------------------|-----------------------------------|-------------------------------------|-------------------------------------|
| Start | 55 | 445 | 11% | 89% |
| End | 399 | 351 | 53.2% | 46.8% |
Please note that percentages are often rounded to one decimal place when they include decimals.
**At the Start:**
- Number with light-colored shells = 55
- Number with dark-colored shells = 445
- Total number of snails = 55 + 445 = 500
**Calculating percentages:**
1. Percentage with light-colored shells:
\[
\text{Percentage with light-colored shells} = \left(\frac{55}{500}\right) \times 100 = 11\%
\]
2. Percentage with dark-colored shells:
\[
\text{Percentage with dark-colored shells} = \left(\frac{445}{500}\right) \times 100 = 89\%
\]
**At the End:**
- Number with light-colored shells = 399
- Number with dark-colored shells = 351
- Total number of snails = 399 + 351 = 750
**Calculating percentages:**
1. Percentage with light-colored shells:
\[
\text{Percentage with light-colored shells} = \left(\frac{399}{750}\right) \times 100 = 53.2\%
\]
2. Percentage with dark-colored shells:
\[
\text{Percentage with dark-colored shells} = \left(\frac{351}{750}\right) \times 100 = 46.8\%
\]
Now we can fill out the table:
| Point in time | Number with light-colored shells | Number with dark-colored shells | Percentage with light-colored shells | Percentage with dark-colored shells |
|---------------|----------------------------------|-----------------------------------|-------------------------------------|-------------------------------------|
| Start | 55 | 445 | 11% | 89% |
| End | 399 | 351 | 53.2% | 46.8% |
Please note that percentages are often rounded to one decimal place when they include decimals.