Jenny wants to design a billboard to be situated on a highway. if the billboard must be readable from a distance of 15 feet, and the average car allows for a viewing angle of 60° with an eye level of 4 feet, how high the top of the billboard must be from the road such that it is the maximum height possible for the billboard in that viewing window?

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:

26?

step-by-step explanation:

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.