The American Ballet Theatre opened at 5:30 p. m. In the 1st hour, 225 people purchased admission tickets. In the 2nd hour, 30% more people purchased admission tickets than in the 1st hour. Each ticket costs $22.25.

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?