Please help me with this

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?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.