Solve the word problem using the plotted points on the graph.

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?

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Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)