Answer:
Step-by-step explanation:
ignore the "at the instant the man is 30 feet away" part, set it as X and the man's shadow as Y.
Similar triangles so we can do .
Solve for it we get 44y = 6x
Differentiate relative to time t, we get 44y' = 6x'.
change in x (x') is equal to 5. And we get the answer y' = .
the ft/sec is the rate of which the length of the shadow is changing. add 5 to it for the rate of the tip of his shadow moving away from the tower.
Do you mean ^2? cause if so... B don't really need crit points to solve, the parabola has a positive slope before x =2
If you are trying to find the interest, it would be $60.00. To get this just multiply everything. Hope this helps!!! :)
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