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The algebric expression for the sum of N and 9 is 
Answer:
X=30
Step-by-step explanation:

Answer: D, 540
Step-by-step explanation:
The volume is h x l x w so it's 9x15x4
Answer:
plz retake pic cant see
Step-by-step explanation:
Answer:
0.0035 ≤ x ≤ 0.0045
Step-by-step explanation:
Given that:
The error = 1/1000 = 0.001 / 2 = 0.0005 s
Hence, 0.004 ± Error
0.004 ± 0.0005
Lower boundary = (0.004 - 0.001) = 0.0035
Upper boundary = (0.004 + 0.001) = 0.0045
0.0035 ≤ x ≤ 0.0045