The approximate radius of the cone’s base unite. the approximate volume of the cone is __ cubic units

Approximate radius of cone's base is 21 units

Approximate volume of the cone is 9702 cubic units

Step-by-step explanation:

1. Area of the base (which is a circle) is given as 1386. We know that area of a circle is given as

Equating this to 1386 and solving for :

is approximately 21 units

2. Volume of Cone is given by

Given radius and height are equal and they are 21 units each, plugging in the values we get:

Volume of Cone =

Volume of Cone is approximately 9702 cubic units.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18