017 5.0 points
an oxygen molecule at 25°c has a speed of
about 854 meters per second. express this
speed in miles/hour. (1 mi = 5280 ft)
1. 0.000523 miles/hour
2. 12300 miles/hour
3. 307 miles/hour
4. 19100 miles/hour
5. 0.0001 17 miles/hour
6. 0.531 miles/hour

Answer this question only if you know the answer! 30 points and

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]