Write the number in expanded form 430,290,100

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

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

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x