What is 3,480,000,000 in scientific notation

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2