A scientest fins stone tools in the ruins of ancient house the house also has ashes in a fire place

Step-by-step explanation:

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Aside from rocks and fossils, radioactive dating can also be used to date man-made objects, such as archaeological materials and ancient artifacts. The scientists can estimate the age of the stone tools by looking at the age of the sediment layers where they are found. In this case, knowing the age of tools would involve dating the traces of charcoal in the ashes from the hearths.

Step-by-step explanation:

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2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°