24ft long, 12ft wide
2/.25=8 8x3=24
1/.25=4 4x3=12
#13:
s² = 144
√(s²) = √144
|s| = 12
s = -12 OR s = 12
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#15 (not sure what letter you used so I went with 'g')
(g-6)² = 25
√[(g-6)²] = √25
|g-6| = 5
g - 6 = -5 OR g - 6 = 5
g = 1 OR g = 11
The digit in the ten thousands place is ten times the digits in the thousands place. if that's helps
Four batches can be made with 6 cups