Question

MATHEMATICS - Question: 9/20
9
)
If z = 0.064, then the value of cube root of z is
A.0.4
B.0.2
C. 0.5
D. 0.16
Select Answer:​

Answer 1

Answer:

0.4

Step-by-step explanation:

Momentarily ignoring the decimal places, it is given that z=64

we know that 4 cube is 64

Therefore $\sqrt[3]{0.064} = 0.4$

Answer 2

Answer:

Answer:

\left(\frac{1}{z}\right)^{\frac{1}{3}}=2.5

Step-by-step explanation:Given\:z=0.064

\implies z=\frac{64}{1000}

\implies z = \left(\frac{4}{10}\right)^{3}

\implies \frac{1}{z}=\left(\frac{10}{4}\right)^{3}

Now,\\ \:\left(\frac{1}{z}\right)^{\frac{1}{3}}=\left(\frac{10}{4}\right)^{3\times\frac{1}{3}}

\implies \left(\frac{1}{z}\right)^{\frac{1}{3}}=\frac{10}{4}\\=\frac{5}{2}\\=2.5

Therefore,.

\left(\frac{1}{z}\right)^{\frac{1}{3}}=2.5

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