SOLUTION: If the value of K^-5 is twice the value of 4k^-2. What is the value of k? A) 1/4 B) 1/2 C) 2 D) 4

Algebra ->  Expressions -> SOLUTION: If the value of K^-5 is twice the value of 4k^-2. What is the value of k? A) 1/4 B) 1/2 C) 2 D) 4      Log On


   

Question 1043404: If the value of K^-5 is twice the value of 4k^-2. What is the value of k?
A) 1/4
B) 1/2
C) 2
D) 4
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
B) 1/2

1%2Fk%5E5+=+2%2A%284%2Fk%5E2%29
===> 1%2Fk%5E5+=+8%2Fk%5E2 ===> 1%2Fk%5E3+=+8
===> k%5E3+=+1%2F8 ===> k = 1/2.