The four values of f correspond to the coefficient of friction for four road and tire conditions: an icy road with fair tires, a very good road with great tires, an asphalt road with fair tires, and a wet road with fair tires. match the coefficients of friction to the appropriate conditions by looking at the braking distance required.

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)

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7

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yuo ned the activity or vertical angle of the form of 1,7 but 2,2 has a c4,2 as it verticie so i not have a car

answer: i think you should do the math and pay attention in class : )

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that is truly what   think but if i get the answer i will