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Tutors Answer Your Questions about Square-cubic-other-roots (FREE)
Question 206036: There are two questions to this, but I believe I answered the first part correctly.
1a.)Suppose that N=sqrt x+2 models the number of cases of an infection, in millions, of a disease x years from now.
How many cases of the infection will there be 16 years from now?
My answer is: N=sqrt x+2
sqrt(16)=4
sqrt(16)+2=6
6 million cases in 16 years.
1b)In how many years will there be 7 million cases?
Part b is what I need help with. Will you please show me this step by step?
Thank you for your help.
Click here to see answer by Earlsdon(4900)   |
Question 206098: please help me understand this problem.
the problem is a multiple choice question, and basically reads what is this equal to -
x times the cube root of x squared
the answer is -
the cube root of x to the fifth power.
I really just cant remember this and would greatly appreciate any assistance. Thanks in advance!
Click here to see answer by RAY100(1637) |
Question 207275: Divide, and if possible, simplify. Assume all variables represent positie real numbers.
root:5(a^3b^9c^3)/sqrt:(a^-2bc)
I asked a tutor to assist and received a different answer than the possibilities that are on the quiz sheet!
Click here to see answer by RAY100(1637) |
Question 207621: Helping daughter with homework and my memory has gone. This is probably pretty easy but I just need the rule when working these out so here goes -
2b^3 with b=4, I had gone for 2x4 =8x4x4x4 = 512, wrong! Can someone give me the answer explain the process?
Thanks
Click here to see answer by Edwin McCravy(2922) |
Question 207914: Adding and subracting Radicals. All variables in the following represent positive numbers. Simplify the sums and differences. Give exact Answers.
Not sure how to write this but will give it my best shot and hopefully someone will understand. This problem has the symbol of the square root with the 5 - 3 sqrt 5 all under it. Not sure what that is called.
sqrt5-3sqrt5.
Click here to see answer by jim_thompson5910(13794) |
Question 208437: I got this wrong.
(3x-2y)^2= (that's the equation)
9x^2-4y^2 (this is what i got by distributing the second power to everything in the parenthesis)
The book said the answer was 9x^2+4y^2-12xy.
Can you explain why I got it wrong and how to get the right answer?
Click here to see answer by nerdybill(2446)  |
Question 208681: Hi, I am needing help with this problem. Thanks for any help you offer!
Multiply and simplify, assume that all espressions under radicals represent nonnegative numbers.
 and  .
I have the answer just not sure how I got it. x^6y^7 then 3sqrt x^2y
Thanks!
Click here to see answer by ichudov(404)  |
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