Mathematics, 17.06.2020 22:57, Jsquad8879
In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5,000 accidents, the average speed was 46 mph and the standard deviation was 13 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal.
A. Roughly what proportion of vehicle speeds were between 27 and 57 mph?
B. Roughly what proportion of vehicle speeds exceeded 57 mph?
Answers: 1
Mathematics, 21.06.2019 20:00, adriancastaneda
The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?
Answers: 1
Mathematics, 22.06.2019 00:20, mya1318
Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte
Answers: 2
Mathematics, 22.06.2019 01:10, abadir2008
Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.
Answers: 3
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