SOLUTION: The formula T = 0.04x2 + 25 models the percentage of tuna, T, in a certain fish population x years after 1980. In what year will the percentage reach 46.16?

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Question 1124072: The formula T = 0.04x2 + 25 models the percentage of tuna, T, in a certain fish population x years after 1980. In what year will the percentage reach 46.16?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
0.04x%5E2%2B25=46.16
0.04x%5E2=46.16-25
x=sqrt%28%2846.16-25%29%2F0.04%29--------------1980 plus this

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!
The formula T = 0.04x2 + 25 models the percentage of tuna, T, in a certain fish population x years after 1980. In what year will the percentage reach 46.16?
Correct answer: