317,081 in expanded form
2 answers:
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Answer:
The maximum area is 1,600 square meters
Step-by-step explanation:
<u><em>The complete question is</em></u>
What is the maximum area possible?
The given function area is modeled by A(w)=-w(w-80)
we know that
The given function is a vertical parabola open downward
The vertex is a maximum
The x-coordinate of the vertex represent the width for the maximum area
The y-coordinate of the vertex represent the maximum area
Convert the quadratic function in vertex form
Factor -1
Complete the square
Rewrite as perfect squares
----> function in vertex form
The vertex is the point (40,1,600)
therefore
The maximum area is 1,600 square meters
The error that Barbara's made is that Barbara wrote (d+63) instead of (d+9).
<h3>What is Distributive property?</h3>The distributive property of multiplication is that when two numbers are added such as (a+b) and multiplied by a third number such as x, then the result will be the sum of multiplication of the third number with the first number (xa) and the third number with the second number (xb).
x(a+b) = xa + xb,
The expression which is equal to the expression 7d+63 can be written as,
Hence, the error that Barbara's made is that Barbara wrote (d+63) instead of (d+9).
Learn more about Distributive property: