My mom is making me do this and 2 others, which was PAST, I did them but at like 75%,why make me redo them if their PAST *starts getting stressed* whatever, please help

Renita analyzed two dot plots showing the snowfall during the winter months for city a and for city b. she found that the median snowfall is 5 inches less in city a than in city b. the mean snowfall is about 2 inches less in city a than in city b. which explains why there is a difference in the measures of center for the sets of data?

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Factor the polynomial. b^2 + 4b + 4