David is preheating his oven before using it to bake. David created the following linear graph to predict the final temperature after xx minutes. What does the y-intercept in the graph represent? A. The oven's temperature after 0 minutes.
B. The change in degrees Fahrenheit for every change of one minute
C. The change in minutes for every change of one degree Fahrenheit.
D .The time when the oven's temperature is 0^{\circ}0
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step-by-step explanation:

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:

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.

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step-by-step explanation:

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