Find the sum of the arithmic series: Please hurry! I have 15 minutes!
1. 28 + 28.4 + … + 42
2. 12 + 22 + … + 142
3. 8 + 13 + … + 58

1. 98.4

2. 176

3. 79

Hope This Helps

Step-by-step explanation:

b 1: 45 am

step-by-step explanation:

its that because if it was in the pm it would be 1345

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: