Sheeba thought of a number, added 7, multiplied by 3, took away5 and divided by 4 to give an answer of 7. Find the number

The answer is 4

Step-by-step explanation:

{7 + 4 = 11} {11 times 3 = 33} {33 - 5 = 28} {28 divided by 4 = 7}

rounding to the nearest thousandth would be 452,000

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: