Answer:
the answer isn't an integer, but simplified it would be:

2.34 x 10 to the 9th power i think
Ok so,
20*2= 40
20*1/2=10
40+10=50
So Johncan travel 50 km in 2 1/2 hours.
Hope this helps :)
Answer:
since if we are testing the null hypothesis at the 95% confidence level is that the difference of the two means is not significant at the 95% confidence level, so the null hypothesis must be rejected.
Hence option 3) is correct.
It’s C. It just need the 1 over lapping of each other