They are all prime numbers,because you can only multiply them by 1.
For this case, we have to define perpendicular lines:

We have then:

Then, according to the definition we have:

We observe that the definition is fulfilled, therefore, the lines are perpendicular.
Answer:
b. they are perpendicular
Answer: 45 degrees
Step-by-step explanation:
Answer:
69.12ft
Step-by-step explanation: