Pls help with question b as soon as possible Great thanks for helping

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primary 5 Maths

Pls help with question b as soon as possible
Great thanks for helping

Date Posted: 7 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Brightness of the light source must be kept constant to determine the amount of light passing through

Date Posted: 7 years ago