## anonymous 5 years ago A.Write the expression (-64)^2/3 in radical notation. B. Evaluate the radical expression. A. Write the expression in radical notation. Do not evaluate. (-64)^2/3=

1. anonymous

n-e body? lol.

2. anonymous

$A.\text{ }(-64)^{2/3}=\sqrt[3]{-64^2}$ $B.\text{ }(-64)^{2/3}==16$

3. anonymous

.......

4. anonymous

Hmmmm.... it wasn't right. :(

5. anonymous

Am I missing something?

6. anonymous

It does say to type an exact answer, using radicals as needed

7. anonymous

theycallmekelly, Do you want a comment from moi?

8. anonymous

9. anonymous

DO you know the correct answer?

10. anonymous

...... I'm so sleepy.....

11. anonymous

You quit writing robtobey!

12. anonymous

With regard to problem A. I took it to mean that the fractional exponent should be converted to radical form, ie: radical sign or square root symbol. Problem B seems to request the value of Problem A. $(-64)^2 = 4096$ The cube root of 4096 is 16. $4096^{1/3} = \sqrt[3]{4096} = 16$ By convention: $\sqrt[3]{x^2} = x^{\frac{2}{3}}$

13. anonymous

So A would be 4096?

14. anonymous

...........

15. anonymous

No. Refer to the second version of A. It says not to evaluate A. Only show the symbolic form of the expression, not the number value of the expression. The whole thing seems to be a test of whether or not you under stand how to handle fractional exponents. Google "fractional exponents math' and I'm sure you will find some excellent presentations regarding fractional exponents.

16. anonymous

Lol, so what is A then?

17. anonymous

The answer to A is: $\sqrt[3]{(-64)^2}$ That's about all I can do with this problem.

18. anonymous

Yes! Lol, that part was right!

19. anonymous

Any idea on B?

20. anonymous

The answer is 16 as I tried to explain in my second response to you tonight.