Will give brainliest answer quick! 8/t; t = 4 evaluate the expression for the given value(s) of the variable(s)

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?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost