Question

A kite 50ft above the ground moves horizontally at a speed of 8ft/s. At what rate is the angle between the string and the horizontal decreasing when 300ft of string has been let out?

Answer 1

d = r •t
t = d / r
r = d / t

Hope this helps, because these are the formulas.

Answer 2

still dont get how to set up the equation

Answer 3

300ft is the distance. and 8ft/s is the time, right?

Answer 4

correct

Answer 5

So, use r = d / t.

Answer 6

300 / 8 = 37.5

Answer 7

derivate

\[\cos \alpha = \sqrt{a^2-b^2} / a \]