exam Maths Puzzle Numerical Ability

graph the function and determine the intervals if any on the real axis for which f(x) is greater than or equal to 0.
f(x)=x^2+1
thanks and i hope you can help

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exam Other Question

A ranger at the top of a tower 450 feet tall observes the angle of depression to a fire to be 5.3 degrees. What is the ground distance to the fire from the tower? Round to three Find the solution by substitution:
4x+3y=5
2x-y=-5