According to the standard model of the sun, as the distance from the center increases

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?

What trait will a heterozygous individual express? a.neither dominant or recessive b.dominant c.recessive

Which lists the main component of darwin’s theory of evolution