I don’t get D do I need to subtract the x to make it positive?

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 border line of the linear inequality 4x + 7y < 5 is dotted true or false?

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9