Can someone pls help with my assignments I’ll pay u 20$

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

The graph represents f(x)=[x]+3. what is f(-2.2)?

Megan and desmond each add the same amount of water to their aquarium megan makes 5 ml of chemical solution with every gallon of water for her aquarium desmond mixed 8 ml of chemical solution for every 2 gallon of the water for his aquarium.