Answer:
422 that's how long the wingspan will be.
Answer:
x = ⅗ = 0.6
Step-by-step explanation:
A square has four equal sides.
If a square has a side length of , therefore,
Perimeter of the square =
.
Also, a regular octagon has 8 equal sides.
If it has a side length of 3x, therefore:
Perimeter of the octagon =
=
Given that the Perimeter of the rectangle and the octagon are the same, to find the value of x, set each perimeter equal to the other.
Thus:
Subtract 4x from each side
Divide both sides by 20
x = 12/20 = ⅗ = 0.6.
B. 114
C. 122
D. 314
E. 192
Answer:
C. 122
Step-by-step explanation:
Given,
Dimension of the cake:
Length = 12 in Width = 16 in Height = 4 in
We have to find out the area of the tray that is not covered by the cake.
Indra centered the cake on a circular tray.
Radius of the tray = 10 in.
So area of the tray is equal to π times square of the radius.
Framing in equation form, we get;
Area of tray =
Since the cake is placed in circular tray.
That means only base area of cake has covered the tray.
Base Area of cake =
Area of the tray that is not covered by the cake is calculated by subtracting area of base of cake from area of circular tray.
We can frame it in equation form as;
Area of the tray that is not covered by the cake = Area of tray - Base Area of cake
Area of the tray that is not covered by the cake =
Hence The area of the tray that is not covered by the cake is 122 sq. in.
Mr. Jackson wants to build a pool in his backyard. He plans to put a safety fence around the rectangular pool area that has an area of 400 square feet. He wants to use as little fence material as possible.
What are the dimensions Mr. Jackson should use for his rectangular pool area?
A.
Make a list.
Create a list of all possible whole-number combinations of length and width that would equal an area of 400 square feet. Then start calculating the perimeter of each rectangle. Look for a pattern to decrease the number of calculations you have to make.
B.
Write a number sentence.
Use a number sentence to calculate the area of a rectangle. Use guess and check to find two numbers that when multiplied will give a product of 400.
C.
Use objects.
Arrange 400 square tiles in different patterns until you get a rectangular shape. Count the number of tiles on the perimeter of the shape.