To determine which statements are true, we can first calculate Ed's speed.
The walkway is 44 feet long and Ed takes 20 seconds to cross it. We can calculate his speed as follows:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} = \frac{44 \text{ feet}}{20 \text{ seconds}} = 2.2 \text{ feet per second} \]
Now, we can verify each statement:
-
Ed travels 2.2 feet per second.
- True, as calculated above.
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Ed travels 11 feet every 5 seconds.
- Calculate: \( 2.2 \text{ feet/second} \times 5 \text{ seconds} = 11 \text{ feet} \) – True.
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Every 10 seconds, Ed travels 22 feet.
- Calculate: \( 2.2 \text{ feet/second} \times 10 \text{ seconds} = 22 \text{ feet} \) – True.
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Ed travels 0.9 of a foot every 2 seconds.
- Calculate: \( 2.2 \text{ feet/second} \times 2 \text{ seconds} = 4.4 \text{ feet} \) – False.
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Every 8 seconds, Ed travels 32 feet.
- Calculate: \( 2.2 \text{ feet/second} \times 8 \text{ seconds} = 17.6 \text{ feet} \) – False.
Based on these calculations, the true statements are:
- Ed travels 2.2 feet per second.
- Ed travels 11 feet every 5 seconds.
- Every 10 seconds, Ed travels 22 feet.
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