A helicopter lifts up 1000 feet over an island and spots a swimmer in the water (who needs to be rescued). The helicopter pilot determines the angle of depression to the swimmer to be 55°. Estimate, to the nearest foot, the distance between the helicopter and the swimmer. Show a labeled diagram and all work.

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

the equivalent expression are always the hardest ones but you look at the gcf also

step-by-step explanation:

1010: 3030

is it i think

5+2x=a

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