Answer:
The volume of a right circular cone is
.
Step-by-step explanation:
The circumference of the base of a right circular cone is 125.6 ft.
Height of cone is 75 ft.
Circumference of base is :
, r is radius

The volume of a cone is given by :

So, the volume of a right circular cone is
.
Answer:
-8 :)
Step-by-step explanation:
X = pencils, y = pens
8x + 6y = 8.50
4x + 4y = 5.....multiply by -2
----------------
8x + 6y = 8.50
-8x - 8y = -10 (result of multiplying by -2)
-----------------add
-2y = - 1.50
y = -1.50 / -2
y = 0.75 <=== pens cost 0.75
4x + 4y = 5
4x + 4(0.75) = 5
4x + 3 = 5
4x = 5 - 3
4x = 2
x = 2/4
x = 0.50 <== pencils cost 0.50
Answer:


Step-by-step explanation:
l = Length = 
w = Width = 
Area is given by

Area of the room is
.
If 
Area of the room

So, the amount of carpet needed would be
.
Answer: 1. 26-12=14
2. 19-12=7
3. 17.50 divided by 7=2.5
Step-by-step explanation: