Here are some of my notes from my 7th grade math class!
Answer:
total surface area = 936 in²
Step-by-step explanation:
total surface area = surface area of the pyramid + surface area of the cube
1. surface area of the pyramid = 4 * area of lateral triangle side
area of lateral triangle side = 12 * 9 /
area of lateral triangle side = 54 in²
2. surface area of the pyramid = 4 * 54
surface area of the pyramid = 216 in²
3. surface area of the cube = 5 * (12 x 12)
-surface area of the cube = 720 in²
therefore, the total surface area = 216 in² + 720 in²
total surface area = 936 in²
Answer:
Option A)
Step-by-step explanation:
Remember that the volume of a rectangle is:
Where l is the length, w is the width and h is the height.
In the figure, these three dimensions are given as a function of the variable v.
Then the volume will be the product of the three expressions.
If we have the volume, the width and the length of the rectangle, then we find the height when we divide the volume by the product of the width and the length
The volume is:
The product of the width and the length is:
Now
we factor quadratic expressions
We use the quadratic formula to factor the expression
We also factor the quadratic function using the quadratic formula
So the height is
B) 4.90
Hope that helped :)