Asked by Sue
The surface area of a cube can be found using the formula A = 6s^2 where A represents the surface area of the cube and s represents the length of one edge. My teacher wants me to draw a cube that has a length of at least 5 inches.
She also wants to know the independent variable
Along with notation to show domain and range
A = 6(5 inches)2
6(25 square inches)
150 sq. inches
Don't understand how to write domain and range
She also wants to know the independent variable
Along with notation to show domain and range
A = 6(5 inches)2
6(25 square inches)
150 sq. inches
Don't understand how to write domain and range
Answers
Answered by
Steve
clearly, for a physical cube, the sides cannot be zero or negative. So, the domain is all positive real values:
s > 0
So, the range, 6s^2, is also all positive reals,
A > 0
Your teacher has further restricted the domain to
s >= 5
So, the range
6s^2 >= 150
In interval notation, that is
domain: [5,∞)
range: [150,∞)
s > 0
So, the range, 6s^2, is also all positive reals,
A > 0
Your teacher has further restricted the domain to
s >= 5
So, the range
6s^2 >= 150
In interval notation, that is
domain: [5,∞)
range: [150,∞)
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