Answer:
18
Step-by-step explanation:
I'm sorry if it's wrong but I believe the answer is 25<m<400
390 inches long
The string = x
x = 390 inches
Divide
[4 + (12 - 2) ÷ 5] ÷ 7
[4 + 6 / 5] / 7
[10 / 5] / 7
2 / 7
= 2/7 or 0.28571428571