So I need to solve for t using the equation and substitute it into the derivative so I can do part two and find the velocity. I'm a little lost on trying to solve for t, but that's the only thing I need help with. Greatly appreciated, thank you!

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this

the answer is 25 because they're both the same