Solve this question. 50 pts!!

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.