Percentage Post-Assessment Which equation can be used to find what percent 150 is of 400?
M
150 = 400p
O 150 = 250p
(400 - 150) = 150p
0 150(400) = p

if x decreases by 4 then y increases by 10

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:

the correct answer is the second option

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8