When writing the number 4250000 in scientific notation, it becomes 4.25 × 10^k. What is the value of k?

Write the following in exponential form.

$m\mathit{\times }m\mathit{\times }m\mathit{\times }m\mathit{\times }m$

Calculate the value and find which is greater:

$3^6$ or $6^3$

$2^{3^2}=$

If the following expression can be written as $9y^m{z}^n$, find the value of $(m-n)$.

$9\times \mathrm{y}\times \mathrm{y}\times \mathrm{y}\times \mathrm{y}\times \mathrm{z}\times \mathrm{z}\times \mathrm{z}$

Write the following in exponential form.

If the exponential form of $\mathrm{a}\times \mathrm{a}\times \mathrm{a}\times \mathrm{b}\times \mathrm{b}\times \mathrm{b}\times \mathrm{b}\times \mathrm{c}\times \mathrm{c}\times \mathrm{c}={\mathrm{a}}^{\mathrm{x}}{\mathrm{b}}^{\mathrm{y}}{\mathrm{c}}^{\mathrm{z}}$, then find the value of $x+y+z$. 

Write the following as exponents of its prime factors.

$1200$

Write the following in exponential form.

$5\times 5\times 2\mathit{\times }a\mathit{\times }a\mathit{\times }a$