I need help guys and girls to question 3

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?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Is the power produced directly proportional to the wind speed, give reasons for your answer?