In the assifnments from this course on the 1 problem set, in exercise 3 I simply dont understand what I'm doing wrong.
y = 1000 - x^2
y' = -2x
I need to find the line that is tangent to y and that also passes through (0,1100).
I get y-yo=y'(xo)(x-xo)
But i dont know (xo,yo)
Please help
Original question:
3. On the planet Quirk, a cell phone tower is a 100-foot pole on top of a green
mound 1000 feet tall whose outline is described by the parabolic equation y = 1000 − x^2
. An ant climbs up the mound starting from ground level (y = 0). At what height y does the ant begin to
see the tower?

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