Answer:
S
Step-by-step explanation:
...................
Answer:

Step-by-step explanation:
=>
[
]
=> 3.64 + 0.6
=> 4.24
Hope this helped!
~AnonymousHelper1807
Answer:
13
Step-by-step explanation:
there is a rule that says that if you add any 2 sides, it should be more than the third. 9+21 is greater than 13. 21+13 is greater than 9. 13 is the only number which if you add 9 to it it will be greater than 21. 12 will equal 21, but it still wont work.
hope this helps :))
512, the formula for volume is length x width x height :)