What's a reasonable domain for (x)(200-2x)

Which is the graph of the function y=2(4)^x

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

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