If a+1/a=4, find a3+1/a3​

Is a deceasing linear model or an exponential decay model likely to be a better fit for the data about remembering? ?

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

Can someone me i’m confused. will give brainliest and a whole bunch of points