Which system if linear inequalities is represented by the graph

Mary spent a total of $323.14 for a party. she spent a total of $200.22 on food, plus an additional $30.73 for each hour of the party. how long was the party?

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.