Answer:
Part A) Rectangle
Part B) Triangle
Part C) Cone
Part D) Circle
Step-by-step explanation:
Part A) Perpendicular cross section of a cylinder
The perpendicular cross section of a cylinder is a rectangle
The base of the rectangle is equal top the diameter of the circular base of cylinder and the height of the rectangle is equal to the height of the cylinder
Part B) Perpendicular cross section of a pyramid
Cross sections perpendicular to the base and through the vertex of a pyramid will be triangles
Part C) Shape created when a right triangle is rotated about the y-axis
When a right triangle is rotated about the y-axis, then it forms a cone.
The vertical leg of the triangle becomes the height of the cone.
The horizontal leg of the triangle becomes the radius of the cone.
The hypotenuse of the triangle becomes the slant height
Part D) Parallel cross section of a sphere
The parallel cross section of a sphere is a circle
All cross sections of a sphere are circles
Answer:
49
Step-by-step explanation:
To find the number of color pencils sold you simply multiply the number of color pencils by the number of 1st classes:

- each class sold 7 color pencils
- there are seven 1st G classes
Then, you replace in the formula and you obtain:

hence, there were 49 color pencils sold
Answer:
The first one is 8
The second one is 4
And the third one is 4
Step-by-step explanation:
Answer:
- Heather's model represents the greater area.
greater.
Step-by-step explanation:
The formula for calculate the area of a rectangle is:

Where "l" is the lenght of the rectangle and "w" is the width.
The formula for calculate the area of a square is:

Where "s" is the side lenght.
In this case, knowing that Elle's model represented 20 feet by 15 feet, we can say that:

Therefore, substituting these values into the formula
, we get that the area is:

Since Heather's model represented 18 ft by 18 feet, we can identify that:

Substituting this value into
, we get this area:

Notice that Heather's model represents the greater area.
To calculate how much greater it is, subtract the areas. Then:

Solve the equations
if it looks like this
(Example)
7 = 8 it has no solutions
7=8 its is all real solutions
x=8 its one real solution