Jim's work evaluating 2 (three-fifths) cubed is shown below. 2 (three-fifths) cubed = 2 (StartFraction 3 cubed Over 5 EndFraction) = 2 (StartFraction 3 times 3 times 3 Over 5 EndFraction) = 2 (StartFraction 27 Over 5 EndFraction) = StartFraction 54 Over 5 EndFraction Which statement best describe Jim's first error?

Respuesta :

Answer:

[tex]2(\frac{3}{5}) ^{3}=2(\frac{3^3}{5^3})[/tex] and not [tex]2(\frac{3}{5}) ^{3}=2(\frac{3^3}{5})[/tex]

Step-by-step explanation:

Jim's work evaluating [tex]2(\frac{3}{5}) ^{3}[/tex] is shown:

[tex]2(\frac{3}{5}) ^{3}=2(\frac{3^3}{5})=2(\frac{3X3X3}{5})=2(\frac{27}{5})=\frac{54}{5}[/tex]

If you look at the Second step, the exponent is taken over only the numerator. It should have been taken over both the numerator and denominator as shown below.

[tex]2(\frac{3}{5}) ^{3}=2(\frac{3^3}{5^3})[/tex]

The correct workings therefore is:

[tex]2(\frac{3}{5}) ^{3}=2(\frac{3^3}{5^3})=2(\frac{3X3X3}{5X5X5})=2(\frac{27}{125})=\frac{54}{125}[/tex]