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Vera_Pavlovna [14]
3 years ago
5

A triangular prism was sliced parallel to its base. What is the shape of the Cross section shown in the figure?

Mathematics
1 answer:
Nitella [24]3 years ago
8 0

Answer:

it would be a triangle

Step-by-step explanation:

Do good!

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A rectangular playground is surrounded by a chain link fence that costs $2 per linear foot on three sides and a fancier wooden f
NARA [144]

Answer:

31.6 feet by 15.8 feet.

Step-by-step explanation:

Area of a Rectangle = Length X Breadth = LB

The area of the playground is to be 500 square feet

Therefore:

LB=500

Perimeter of the Rectangle = 2(L+B)

The Chain link fence that costs $2 per linear foot on three sides and a fancier wooden fence that costs $6 per linear foot on the fourth side.

Cost = ${2(L+2B)+6L}=2L+4B+6L=8L+4B

Cost= $(8L+4B)

From: LB=500, B=500/L

Substitute B into 8L+4B

C(L) = 8L+4(\frac{500}{L} )=8L+\frac{2000}{L} =\frac{8L^2+2000}{L}

C(L)=\frac{8L^2+2000}{L}

The minimum cost of the fencing occurs when the dimensions are minimum.

If we take the derivative of C(L)

C^{'}(L)=\frac{8L^2-2000}{L^2}

At C^{'}(L)=0

\frac{8L^2-2000}{L^2}=0\\8L^2-2000=0\\8L^2=2000\\L^2=250\\L=15.8 ft

Recall: B=500/L

B=\frac{500}{15.8}=31.6 ft

The dimensions that minimizes the total cost of the fencing are 31.6 feet by 15.8 feet.

4 0
3 years ago
What is the volume of the solid shown above
tankabanditka [31]
539 cm^3

volume of the smaller cube is: 3•3•3 which equals 27.

volume of the bigger cube is: 8•8•8 which equals 512.

add those together and you get 539 cm^3







3 0
3 years ago
Please answer the following attachment down below.<br><br> I would greatly appreciate it if you did.
zepelin [54]

Answer:

34.63

Step-by-step explanation:

A=a2+2aa2

4+h2=32+2·3·32

4+42≈34.63201

4 0
3 years ago
The mean radius of earth is 6,371.0 kilometers and the mean radius of Earth's Moon is 1,737.5 kilometers.What is the approximate
Dmitrij [34]
D≈2π(6371-1737.5)

d≈9267π

d≈29113.1km (to nearest tenth of a kilometer)
4 0
3 years ago
How many strings of eight uppercase English letters are there if no letter can be repeated?
zepelin [54]
....................................3.....................................
7 0
3 years ago
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