Mathematics, 30.06.2020 09:01 tlecuyer
Mr. Moore's physics class built different-shaped parachutes to see which shapes were more effective. The students tested the parachutes by dropping them
from a height of 30 feet and timing the fall. They calculated the summary below:
The students wanted to see what happens to their times when they drop the parachutes from 45 feet. They find that every drop is increased by 2.5 seconds.
Find the new mean and standard deviation.
O Mean, 3.1 seconds; standard deviation, 0.6 second
O Mean, 5.6 seconds; standard deviation, 3.1 seconds
O Mean, 5.6 seconds; standard deviation, -1.9 seconds
O Mean, 8.1 seconds, standard deviation, 0.6 second
Answers: 1
Mathematics, 21.06.2019 13:40
In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?
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Mathematics, 21.06.2019 13:40
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Mathematics, 21.06.2019 15:50
Arectangle has a width of 9 units and length of 40 units. what is the length of a diognal. a. 31 unitsb. 39 unitsc. 41 units d. 49 units
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Mathematics, 21.06.2019 18:30
Find the area of a parallelogram with base 15 yards and height 21 2/3
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Mr. Moore's physics class built different-shaped parachutes to see which shapes were more effective....
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