4.) Ratios, Proportions & Rates of Change

Question 1

Formula for compound growth/decay

Answer 1

• N = N₀ * (multiplier)ⁿ - N0 is the start number
• The multiplier is the percentage increase/decrease
• Small n is the number of periods (days/years etc)

Question 2

Litres to ml and cm³

Answer 2

• 1000 for both

Question 3

m² to cm², and m³ to cm³

Answer 3

• 1 m² = 10,000 cm² (100cm * 100cm)
• 1 m³ = 1,000,000 cm³ (100cm * 100cm * 100cm)