An 800 ml mixture of syrup and water contains 25% syrup. how much syrup (in ml) should be added to this mixture to increase syrup concentration to 40%?

I'm pretty sure illustrators are often represented among the staff of an advertising agency   

See diagram.we use washers to get the area and we will be integrating with respect to xouter radius is the  distance between y = e^x and y = -1    inner radius of washer is the distance between y = 1 and y = -1    the area of one cross-section of a washer is    solid lies between x = 0 and x = 2. the volume is    if you need this expanded, then    the question doesn't say to evaluate, so we're done.