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10 cards from this deck
Effectiveness of antibiotics/antiseptics/plant extracts
πr2\pi r^2πr2
3.14
Diameter
Divide diameter by 2
5 mm (10 ÷ 2)
3.14×52=78.53.14 \times 5^2 = 78.53.14×52=78.5 mm²
More bacteria killed
More effective antibiotic (more bacteria killed)
Calculate area of inhibition zone using πr2\pi r^2πr2
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