well what i got was:
the exact form: 233/28
decimal form: 7.96428571...
mixed number form: 7 27/28
not sure if this is right at all but i hope it helps at least a little
Answer:

T ' = √2 T
Step-by-step explanation:
Given that
Time period = P
Frequency = T
We know that time period for pendulum given as

When the length become half then time period will become p'
L'=L/2



It means that time period will become 0.707 P.
We know that frequency T
T= 1 /P
T' = 1/P'
T'=√2/P
T ' = √2 T
Answer:
0.29, 0.3, 3/10
Step-by-step explanation:
Just pick one
Hope this helps!
Have a nice day!
I believe its 20% salt to water ratio since theres 5 pieces all together