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kaamri97
20.03.2020 •
Mathematics
According to Chemical Engineering, an important property of fiber is its water absorbency. The average percent absorbency of 25 randomly selected pieces of cotton fiber was found to be 20 with a standard deviation of 1.5. A random sample of 25 pieces of acetate yielded an average percent of 12 with a standard deviation of 1.25. Is there strong evidence that the populationJ.mean percent absorbency is significantly higher for cotton fiber than for acetate
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Ответ:
Please find the attached traced distance time graph
Step-by-step explanation:
The given parameters are;
The time at the start of Don's journey = 2 pm.
The distance Don drives one hour after leaving home = 45 miles
The speed (Distance/time) Don drove during that time = 45/1 = 45 mph
The time at which Don first stop driving = 2 pm + 1 hour = 3 pm
Don then stops for 90 minutes
The time after the duration at which Don stops driving = 3 pm + 90 minutes = 3 pm + 1.5 hours = 4.30 pm
At 4.30 pm. Don then starts driving home at 15 mph
The distance from Don's home from where Don stopped is 45 miles, therefore;
Time (Distance/speed) for Don to get home = 45 miles/15 mph = 3 hours
Time Don arrived home = 4.30 pm + 3 hour = 7.30 pm.