In europe, gasoline efficiency is measured in km/l. if your car's gas mileage is 31.0mi/gal , how many liters of gasoline would you need to buy to complete a 142-km trip in europe? use the following conversions: 1km=0.6214mi and 1gal=3.78l.

10.76 liters of gasoline.

Given:

Question:

How many liters of gasoline would we need to buy to complete a 142 km trip in Europe?

The Process:

This case is about gasoline efficiency in Europe.

The steps to solve this case are as follows:

Step-1

The car mileage (in km/L)

Step-2

The amount of gasoline (in L)

Quick Steps:

Thus the amount of gasoline would we need to buy to complete a 142 km trip in Europe is 10.76 L.

Keywords: gasoline efficiency in Europe, car, trip, km/L, mil/gal, mileage, conversions

the answer to this question is in the pic

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: