Will the product of (-3)4 be positive or negative

Classify the following triangle check all that apply

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

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?