W = x 2 − z y 4 , x = t 3 + 7, y = cos 2t, z = 4t
∂w/∂t =?

Through non-collinear points there is exactly one plane.

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?