SOLUTION: HELP!!!!!! please!!!!!! I'd really APPRECIATE IT! simplify: 1. 6^(3/4) A. 3.83 B. 4.5 C. 18 D. 10.90 E. 4.8 F. 1080 2. (-125)^(2/3) A. 5 B. 25 C. -5

Algebra ->  Equations -> SOLUTION: HELP!!!!!! please!!!!!! I'd really APPRECIATE IT! simplify: 1. 6^(3/4) A. 3.83 B. 4.5 C. 18 D. 10.90 E. 4.8 F. 1080 2. (-125)^(2/3) A. 5 B. 25 C. -5       Log On


   

Question 766981: HELP!!!!!! please!!!!!! I'd really APPRECIATE IT!
simplify:
1. 6^(3/4)
A. 3.83
B. 4.5
C. 18
D. 10.90
E. 4.8
F. 1080

2. (-125)^(2/3)
A. 5
B. 25
C. -5
D. -25
E. 253
F. 75

thank a bunch!!!! How is #1 not 4.5? ahhh plese help. :'(
Answer by ramkikk66(644) About Me  (Show Source):
You can put this solution on YOUR website!

1) 6%5E%283%2F4%29+=+%286%5E3%29%5E%281%2F4%29+=+%28216%29%5E%281%2F4%29

It is the 4th root of 216. Using a calculator, you get the answer as highlight%283.83%29

I think you may have confused exponentiation (^) with the multiplation (*) operation.

6*3/4 = 4.5, but 6^(3/4) = 3.83.

2) %28-125%29%5E%282%2F3%29+

= %28-125%5E%281%2F3%29%29%5E2 ---> take the cube root of -125 and square it
= %28-5%29%5E2
=highlight%2825%29

Hope you got it :)