I would say 75 feet per hour, though I am not 100% sure.
I first found the difference between hours (6-2 = 4) and then found the difference between distance (700 - 400 = 300). I then divided distance by hours and got 75.
<h3>
Answer: Invalid</h3>
Explanation:
The conclusion should be due to the hypothetical syllogism rule (similar to the transitive rule).
You can make a truth table to show that the premises and can both be true at the same time, but the conclusion is false. Whenever you have all true premises and a false conclusion, then the argument is invalid. True premises must lead to a true conclusion.
Would be your answer.
z = -12.