What is the area of the base of the cone? A cone with diameter 18 centimeters, height of 12 centimeters, and slant height of 15 centimeters.

B = pi r squared
18 pi centimeters squared
81 pi centimeters squared
225 pi centimeters squared
324 pi centimeters squared

81 pi centimeters squared

Step-by-step explanation:

Area of circle = πr²

18/2 = 9

π9²

π(9 x 9)

π81

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is