PLEASE HELP Most gasoline sold in the United States is made of a blend of 10% ethanol and 90% petroleum. Given that the density of ethanol is approximately 7.9 pounds per gallon, what is the weight in pounds of the ethanol in 12 gallons of gasoline?

94.8 there go go go go

Step-by-step explanation:

true

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: