SOLUTION: If 2^y=10, find the value of 8^(2y-1)

Algebra.Com
Question 1186695: If 2^y=10, find the value of 8^(2y-1)
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!

If , find the value of
first find
....take log of both sides




substitute in



Answer by ikleyn(52780)   (Show Source): You can put this solution on YOUR website!
.
If 2^y=10, find the value of 8^(2y-1)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


 =  =  = 


    now replace in this formula  by   to get


=  =  = 125000.    ANSWER

Solved.



RELATED QUESTIONS

m<1=2y+8 find the value of... (answered by Fombitz)
find the value of y if the mean of 22, 18, (2y+1) 10 and 20 is... (answered by ankor@dixie-net.com,ikleyn)
find the value of y for... (answered by lynnlo)
If 8y-8=24, find the value of... (answered by ankor@dixie-net.com)
PLEASE HELP ME TO SOLVE THESE QUESTIONS............. Q1.IF {{{x^3+1/x^3=2}}} then find (answered by Edwin McCravy,jsmallt9)
y=2-x/1+x then find the value of 1/y+1 +... (answered by Alan3354)
Can you help me: find the vertex, value of p, axis of symmetry, focus, and Directrix of... (answered by ewatrrr)
The value of 4y^(-2/3) + 3y^(2/3) + 2y^(-1/3) + 5y^(1/3) when y =... (answered by tommyt3rd)
If the line (b^2-1)x-(b+1)y=b is perpendicular to the line x+2y=1, then find the value of (answered by josgarithmetic)