A rectangular solid has sides of 4 cm, 6 cm, and 8 cm. What is its surface area?
2 answers:
Answer:
The surface area is
Step-by-step explanation:
In order to determine the surface area of a rectangular solid, we have to know the formula of a rectangular area.
The <em>area of a rectangle</em> is:
Where:
B is the <em>width</em> of the rectangle.
H is the <em>height</em> of the rectangle.
A rectangular solid is a volume that it is formed of rectangular faces, so if we want to determine the total surface, we just have to calculate the rectangular areas for every face.
I have attached an image of a rectangular solid that shows its form and some formulas.
In this case, using the formula of surface area from the image:
Finally, the surface area is
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The given equation is equivalent to Option D .
The mission option is
A. x+10= x+10
B. x+9 =x² + 20x + 100
C. x² +81 = x² + 100
D. x² + 81 = x² +20x + 100
<h3>What is an Equation ?</h3>An equation is a mathematical statement formed when two algebraic expression is equated by an equal sign .
An equation is given in the question
Therefore the given equation is equivalent to Option D .
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Answer:
Domain of the function is { x : x∈R, x>0 } or (0,∞).
Step-by-step explanation:
It is given that the dimensions of a rectangular piece of cardboard are
Length = 14 inch
Width = 10 inch
The box will be constructed by cutting out equal squares of side x at each corner and then folding up the sides. So the dimensions of the box are
Length = 14-2x inch
Breadth = 10- 2x inch
Height = x inch
The volume of cuboid box is
The volume function of the box is
The volume function is V=(14-2x)(10-2x)x.
It is a polynomial function and domain of a polynomial function is all real numbers.
Here, x represents the height of the box. So, value of x must be a positive real number.
Domain of the function is
Domain = { x : x∈R, x>0 }
It can be written as (0,∞).
Therefore, domain of the function is { x : x∈R, x>0 } or (0,∞).