Helping students gain understanding and self-confidence in algebra.
I made x the subject of the formula getting (sqrt(y+28)-5 sqrt(y))/(2 sqrt(y)) and then I found what y is when x= 0 and x=1, which were y=7/6 and y=7/12 respectively.
chinex9a wrote:because we are rotating about the y axis
chinex9a wrote:Yes that is what I did right. pi*(f(y))^2 dy
chinex9a wrote:and so are b and a 7/6 and 7/12 ?