Mr. Padilla drove 10 miles, and his car used up to 5 gallons of gas. How many miles can he drive with 16 gallons of gas?

Step-by-step explanation:

If 5 gallons equals 10 miles, then we can divide to find how many miles 1 gallon can take him.

5÷5=1

10÷5=2

So, with 1 gallon he can drive 2 miles.

Now, we know that we can multiply to find the answer.

1×16=16

2×16=32

So, he can drive 32 miles.

32 miles

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:

answer:

step-by-step explanation: