Which rational expression does not have any excluded values? Please answer correct my grade depends on it

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Are triangles the congruent? write the congruency statement.what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years