The USGBC reports that from 2015 to 2018, LEED-certified buildings have saved $1.2 billion in energy savings and $715.2 million in building maintenance costs. If this trend continues at the same rate over the next 15 years, what will be the savings in building maintenance costs between 2018 to 2033?

2.0000000000000000

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: