Answer:
Step-by-step explanation:

We know that 27^(2/3) = 9. So:
= 
note: 9^(1/2a) = 9^((2/3)(1/2)(a)) = 27^(1/3a)

9 is the answer
These are the things that I found on Google
Here are the most common propane tanks:
→20 lb tank: 18” tall and 12” in diameter. Holds 5 gallons of propane. ...
→33 lb tank: 2 feet tall and 1 foot in diameter. Holds 8 gallons of propane. ...
→100 lb tank: 4 feet tall and 18” diameter. ...
→420 lb tank: 4 feet tall by 3 feet diameter. ...
→500 gallon tank: 5 feet tall by 10 feet long.
Hope this helps ^_^ <em>:3</em>
B
7(3)-3=18
21-3=18
+3 +3
21=21
Hay te explica cual es que mayor > , menor que < entonces tienes que ponerlo al que le corresponda ejemplo 9>6 dice que nueve es mayor que seis