4. is A 15
5. is C 12
6. is B 4, 8, 12, 16
hope this helps :)
Answer:
Step-by-step explanation:
Given
Midpoint is 
Endpoints are
and 
Mid point of any two point is given by

and 
So,


Also



Therefore 
2/3 ÷ 4
2/3 ÷ 4/1
We invert the 4/1 to 1/4 and multiply out.
2/3 × 1/4
= 1/3 × 1/2 2 into 4 is 2.
= 1/(3 × 2)
= 1/6
Hope this helps.
2^5 x 3^4 x 5 /3 x 16
(32*81*5)/3 * 16
(12960/3) * 16
4320 * 16
69120
Answer: the answer is in the attachment.