HELP PLEASE!✋ If the half-life of a decaying isotope is 10 years, which statement is true after
8 years?
A. There are more parent nuclei than daughter nuclei in a sample.
B. The numbers of parent nuclei and daughter nuclei in a sample are
equal.
C. There are more daughter nuclei than parent nuclei in a sample.
O D. The relative numbers of nuclei cannot be determined until 10
years have passed.

WILL MARK BRANLIEST

Acar travels 40m in 8 seconds find the car speed

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius