Homework Help Forum: College Algebra

Posted by Lucy on Saturday, October 24, 2009 at 5:29pm.

I need help with the following problem. I do not understand how to finish working it. -3y^4/5+72=-15 -3y^4/5=-87 y^4/5=29 y=29^5/4 What next? Round answer to two decimal places. Thanks for your help.

• College Algebra - bobpursley, Saturday, October 24, 2009 at 6:09pm

  Ok, round the answer. 29^(1.25)=67

  
  

• College Algebra - jim, Saturday, October 24, 2009 at 6:16pm

  You're right so far, which was the hard bit. Me, I'd just pull out the calculator at this point. I did, and got 67.2972 = 67.30 to 2 d.p. You can do it by = 29 * sqrt(sqrt(29)) or by log tables. I can't think of an especially clever way.

  
  

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