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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
Double sunglasses
Act 1
A video shows two pairs of sunglasses, each with 50% tint. What will be the percent tint for both pairs combined?
Act 3
A video reveals what the combined tint will be.
Sequel
Using glasses with 5% tint, how many will be needed to achieve a target of 60% tint?
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