23-04-2021
Mathematics

contestada

Calculate the area of a circle whose radius is 3 and a half centimeters

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MissAmelia77 MissAmelia77

23-04-2021

Answer:

22 cm²

Step-by-step explanation:

Radius = 3.5 cm

Area of a circle = 2πr

= 2×22/7×3.5

= 2×22×0.5

= 22×1

= 22 cm²

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Background Info:The standard enthalpy of formation (ΔH∘f) is the enthalpy change that occurs when exactly1 mol of a compound is formed from its constituent elem