Answer:15
Step-by-step explanation:13 +2 = 15
Thirty three because I'm just smart like that so you should believe me entirely.
Since
(density = mass/volume), we can get the mass/weight of the liquid by integrating the density
over the interior of the tank. This is done with the integral

which is more readily computed in cylindrical coordinates as

Answer:
13. 16+16-16+16x = 16+16x