#7. C #10. C #11. A #12. C
Step-by-step explanation:
The angle between vectors is given by

The magnitudes for the vectors are as follows:




The dot product between the vectors is

Therefore, the angle between the two vectors is

or

Answer:
volume = 682.67π units³ or 2143.58 units³
Step-by-step explanation:
volume = 4/3πr³
volume = 4/3π8³ = 4/3π(512)
volume = 682.67π
Answer:
The first one
Step-by-step explanation:
(x-4)(x-12) hope this helps