Plot the given parabola on the axes. Plot the roots, the vertex and two other points. y = –2x2 – 38x + 40
Set the scales and drag the axes to change the graph.

the correct answer option is d. la = πrs.

step-by-step explanation:

we know that for a right cone, the lateral surface area is given by:

lateral area of right cone =

here the value under the square root is equal to slant height so replacing this value by in the formula to get:

lateral area of right cone =

therefore, the correct answer option is d.