China has a population of approximately 1,322,000,000 people. express this number in scientific notation. a) 1.322 x 109 b) 1.322 x 10-9 c) 1.322 x 10−8 d) 13.22 x 108

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?

Fifty students are trying to raise at least 12,500 for a class trip. they have already raised 1,250. how much should each student raise on average in order to meet the goal? write and solve the two step inequality for this problem

4percent of a number is what fraction of that number? ? i really need asap