Please answer this correctly

Which function has the smallest y-intercept value

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882