Find the surface area of the come in terms of pi.

first option

Step-by-step explanation:

 The formula for calculate the surface area of a cone is the shown below:

Where: s is the slant height and r is the radius.

As you can see in the figure the slant height and the radius are:

 s=18 cm and r=6 cm

Therefore when you substitute the values shown above into the formula, you obtain that the result is:

cm²

 sq. cm.

Step-by-step explanation:

Surface Area of cone is given by the formula  

The diameter is given as 12, hence radius (r) is half of that, 6.

The slant height (l) is given as 18

Plugging all the values into the formula, we get:

First answer choice is right,   sq. cm.

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed