Answer: the 2nd one
Step-by-step explanation: you didn’t multiply the -7 by 5, therefore being wrong
18 m min 100 cm 30 cm
------ x ----- x --------- = ------
min 60 s m s
-9/5 -(-9/5) is has the value of 0.
The formula is v=pi(r^2)(h)
pi(2^2)(4.2)
pi(16.8)
volume= 52.78m^2
Hope this helps :)