What is the exponent in  $x^y$  

Write the expression using exponents 5*5*5*5

Write the expression using exponents.

n*n*p*p*r*r*r

Write the expression using exponents.
(-7)*(-7)*(5)*(5)*(5)*(5)

Evaluate $3^4-\left(4\right)^2$ . 

Evaluate $6+2^6$ . 

Evaluate $x^3-y^2\ if\ x\ =\ 2\ and\ y\ =\ 4$ . 

Evaluate $\left(g\ +h\right)^3$  when g = 2 and h = 3

What is $3^{4\ }$ power in standard form?

What is $3^{4\ }$ power in expanded form?

A scientist estimates that after a certain amount of time, there would be $2^5\cdot3^3\cdot10^5$  bacteria in a Petri dish. How many bacteria is this?