I need help with this asap

10b^4+3b^4-11

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year the population of her town is changing by a constant rate

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

The graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?