How many gallons of a 25% acid solution should be added with 10 gallons of a 12% acid solution to obtain a 20% acid solution

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

On a architect's drawing of a house, 1 inche representa 1.5

The quadratic function h(t)=-16.1t^2+150 choose the graph representation