Inequality

1. Solve

  
A    
B   
C  
D  

2. Solve

  .
A - s≥21.5
B - s≥21.3
C - s≥22.4
D - s≥22.3

3. Solve -4.5t≤-67.5.
A - t≥14
B - t≥25
C - t≥15
D - t≥-15

4. Solve 0≤-16x.
A - x≤16
B - x≤-16
C - x≤-1
D - x≤0

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