Answer:
Hence the width, length is 20 cm and height is 10 cm
Step-by-step explanation:
Since the box has a square base, let length = width = x. Also, let the height = y, therefore:
The volume of box = width * length * height
4000 = x * x * y
4000 = x²y
y=4000/x²
The surface area (SA) = area of the base + sum of the area of each side
SA = x² + xy + xy + xy + xy
SA = x² + 4xy
substitute y = 4000/x²
SA = x² + 4x(4000/x²)
SA = x² + 16000/x
Taking the derivative:
SA' = 2x - 16000/x²
making SA' = 0:
0 = 2x - 16000/x²
2x = 16000/x²
2x³ = 16000
x³ = 8000
x = 20 cm
y = 4000 / x² = 4000 / 20² = 10 cm
Hence the width, length is 20 cm and height is 10 cm
Answer:
C
Step-by-step explanation:
If the cost is represented by n, why would you subtract the cost of the notebook by 0.78 while multiping it witht the cost?
Answer:
number 3
Step-by-step explanation:
It is quadratic since a quadratic function is of the form :y=ax²+bx+c ,a,b,c are constants.
Answer: The slope is 2 -Please mark brainliest
1. Find the X and Y values of each point
X1: 1
X2: -1
Y1: 3
Y2: -1
2. Subtract X1 from X2 and Y1 from Y2
Y: -1-3=-4
X: -1-1=-2
3. Divide the X value by the Y value
-4/-2=2
The slope of the line shown on the coordinate plane is 2.
