Question

Please help..................................​

Answer 1

Answer:

a.7

b.pg lesser than R

c.315-400

d.0.5mg/l

e.viral disease

f.1972

g.unidirectional

h.10 decibel

i.40 db

j.Si and Mg

Explanation:

I hope this helps you

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Answer 2

1. 7
2. Of lesser than r
3.315-400

Sorry l only know these