Last week, the members of a weight loss support group collectively weighed 2,380 pounds. They just weighed in again and are now 5% lighter. What is the group's current weight?

Their current weight = 2261 punds

Step-by-step explanation:

The weight measured last week = 2,380 pounds

Their current weight got 5% lighter, meaning they lost 5% weight in the current week.

Their lost weight = 5% × 2,380

                                   = 5/100 × 2,380

                                   = 119 pounds

Thus, their current week can be calculated by subtracting 199 pounds from the total weight they previously had:

2380 - 119 = 2261 punds

Thus, their current weight = 2261 punds

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 is : muchas/tipicas

have a nice day!

~recklesschicken