Answer:
hour and a half
Step-by-step explanation:
This is a square. because the lengths and the widths are equal. I mean, all four sides are equal.
the area of a square is the square of a side

and the perimeter of a square is a side multiplied by 4

hope this helps
good luck
It is equal to 7a
we can show that this is true because of distributive property
ab+ac=a(b+c)
2a+5a=a(2+5)=a(7)=7a
Answer:
2160 BTU
Step-by-step explanation:
Ben looks at his plan and realizes that his building can be viewed as a triangular prism sitting on a cube.
Calculating the volume of a cube is easy… Length x Width x Height (LWH)… so 12 x 10 x 8 = 120 x 8 = 960 cubic feet for the cube part.
For the prism, it’s almost the same… but divided by 2 : (LWH)/2, so… (12 x 10 x 2) / 2 = (120 x 2) / 2 = 240 / 2 = 120 cubic feet for the prism part.
Total for the building : 960 + 120 = 1080 cubic feet
Since 2 BTU per cubic foot, the power of the unit needs to be at least 1080 x 2 = 2160 BTU.
HERE IS YOUR ANSWER.......