Answer:
The slop is undefined
i.e. 
Step-by-step explanation:
Considering the slope formula

As the points are (7, -4) and (7, 0)
Here:

so



Therefore, the slop is undefined i.e. 
B .....................................................
Answer:
C, 40%
Step-by-step explanation:
0.15 + 0.25 is 0.4 and in percentage that is 40%
Product means multiply so 2,681 times 4 = 10,724
The formula is 4/3πr^3
4/3 (3.14)(3)^3
answer: 113.09