A study of air quality in Metro City suggests that tt years from now the level of carbon monoxide, in parts per million, in the air can be found with P(t)=0.2t^{2}+0.01t+5.1 What is the level, in parts per million, now?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Find the degree 3 taylor polynomial p3(x) of function f(x)=(-3x+15)^(3/2) at a=2

Ben frank is an electrician who installs lighting fixtures. he charges (in dollars) his clients 15h+40f15h+40f where hh is the number of hours worked and ff is the number of fixtures installed. how much does ben frank charge when he works 77 hours and installs 99 fixtures?