24! If that is not correct please let me know
I’ll explains in the best way I can. Imagine the 3rd one but on the bottom square add one on the left and then one under that. So you would add a total of 2 squares. Hope this helps :)
Answer:
r = 14
Step-by-step explanation:
Slope = 

Cross multiply,
-4 - r = -3*6
-4 - r = -18
-4 = - 18 + r
-4 + 18 = r
r = 14
If the density is 1 per cm^3 and there is 65 cm^3 then the mass is 65g