Click here . the problems are in picture format

First picture:

You got the first two right (good job!), so I'll just tackle the third one. If you have to compute , it means that you have to substitute in place of . Differently from the first two points, this will generate a new function, rather than a specific value:

Second picture:

Given the point highlighted in the picture, you can deduce that the base is units long (since it spans from to ) and the height is units long (because it spans from to ). So, the area of the rectangle is the multiplication between base and height:

But we know that , so we have

The domain of this function is given by the domain of the square root: we want its argument to be non, negative, so we have

But since the problem is symmetric, the answer is

You can only see the answer because, if you choose or , the rectangle degenerates to a segment, and your exercise doesn't like this scenario, apparently

i think it is c hope that