# MATH / 

task_id: 41175514-9237-5966-8d8b-26f39b1ed378
task_key: intermediate~5falgebra--test--41175514-9237-5966-8d8b-26f39b1ed378
task_revision_id: 1

{"level":"Level 4","problem":"Let $T = (a, 9 - a^2)$ be a point on the parabola $y = 9 - x^2,$ for some positive rational number $a.$\n\n[asy]\nunitsize(1 cm);\n\nreal parab (real x) {\n  return(4 - x^2);\n}\n\npair T, X, Y;\nreal m, t;\n\nt = 0.8;\nm = -2*t;\nT = (t,parab(t));\nX = extension(T, T + (1,m), (0,0), (1,0));\nY = extension(T, T + (1,m), (0,0), (0,1));\n\ndraw(graph(parab,0,2));\ndraw(X--Y);\ndraw((0,0)--(4,0));\ndraw((0,0)--(0,5));\n\ndot(\"$T = (a, 9 - a^2)$\", T, NE);\n[/asy]\n\nThe tangent to the parabola at $T$ and the coordinate axes form a triangle with area 25.  Find $a.$","type":"Intermediate Algebra"}

Source: https://github.com/hendrycks/math

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