+14 \(\sqrt{0.64}-\sqrt[3]{-0.008}+\sqrt[4]{\frac{4}{20.25}}+\sqrt[5]{16\div\frac{1}{2}}\)
This is what I have so far:
sqrt(0.64)=0.8
cbrt(-0.008)=-0.2
frrt(4/20.25)=sqrt(2)
firt(32)=2
0.8-(-0.2)+sqrt(2)+2=
3+sqrt(2)
But apparently that is the wrong answer
What have I done wrong
+23246 When you are finding the fourth root of ( 4 / 20.25 ) --
the fourth root is the square root of the square root , so:
fourth root of ( 4 / 20.25 ) = sqrt( sqrt( 4/20.25) ) = sqrt( 4/9 ) = 2/3
because the sqrt( 4/20.25 ) = 2/4.5 or 4/9
No problems with the rest of the problem ...
