The expression A is equivalent to 28+7
7 times 4 equals 28 7 times 1 is 7
28+7
263.89 i think brainiest if correct?
EXPLAINATION: 
x 100% = 263.8888888889%
If the base is on the x-axis, the width of the rectangle is = xif the height is based on the parabola, the length = 7-x^2
the area of a rectangle = length * width
thus, area = x*(7-x^2)= 7x-x^3
in order to maximize the area, you would need to take the derivative of the area and set it equal to 0
Area = 7x-x^3Area' = 7 - 3x^2
7-3x^2 = 0thus, x = 1.5275
this x represents the x needed to create the largest possible area with the given parameters.
Thus:Width (x-axis) = 1.5275Length (y-axis) = 7 - (1.5275)^2 = 4.6667
Let's change 298 into 300 to make it a friendly number, now 300*6
Now subtract 12
1800-12=1788
