Can someone please help me with these two questions i’ll give you brainliest

He amount of carbon-14 present in animal bones t years after the animal's death is given by p(t)equals=upper p 0 e superscript negative 0.00012097 tp0e−0.00012097t. how old is an ivory tusk that has lost 26% of its carbon-14?

Solve 2x+y=3 x+y=5 in substitution method

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?