An arrangement of flowers originally priced at $48.00 is marked down to $39.00. what is the percent of decrease, rounded to the nearest whole number?

To find the percentage of decrease, use this formula.

Percentage decrease=  old amount- new amount

                                               old amount

So subtract 48 by 39 which is 9.

Divide it by 48, which is  0.1875.

DO NOT STOP THERE! Multiply that by 100 to get the percent amount, then round it off, which is 19%.

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:

do your own work and don"t cheat.

step-by-step explanation: