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3 years ago

Surface area of a rectangular prism? Dimensions Length: 3 Width: 4 Height: 5

Mathematics

2 answers:

DochEvi [55]3 years ago

4 0

Answer:

Step-by-step explanation:

Surface area of a rectangular prism = 2(lw + wh + lh)

where l = lenght, w = width and h = height

here we are given that the rectangular prism has a lenght of 3, a width of 4 and a height of 5.

So we have SA = 2(lw + wh + lh)

==> plug in l = 3, w = 4 and h = 5

SA = 2((3)(4) + (4)(5) + (3)(5))

==> find products of numbers that are next to each other seperated by parenthesis

SA = 2(12 + 20 + 15)

==> find sum of values in parenthesis

SA = 2(47)

==> multiply 2 and 47

SA = 94

BARSIC [14]3 years ago

4 0

Answer:

Surface area = 94

Step-by-step explanation:

║Formula for {Area of a Rectangular Prism} ║:

2(lw + wh + lh)

Which can also express as:

2(Lw) + 2(Wh) + 2(Lh)

While,

L = Length

W = Width

H = Height

║ Given ║ :

Length: 3

Width: 4

Height: 5

║Solve ║:

2( 3 × 4) + 2(4 × 5) + 2(3 × 5)

(6 × 4 )+ (8 × 5) +( 6 × 5)

24 + 40 + 30

64 + 30

94

Hence, the surface area of a rectangular prism is:

94

Kavinsky

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Given the matrices: 1 2 A= 1 -1 2 1 1 B= 3 4 Calculate AB: C11 C12 [2.1] х 1 2 3 4 C21 C22 C11 = C12 = -2 C22 - C215 DONE

eduard

Answer:

$\:c_{11}=-2,\:\:\:c_{12}=-2$

$\:c_{21}=5,\:\:\:c_{22}=8$

Step-by-step explanation:

Given the matrices

$A=\begin{pmatrix}1&-1\\ 2&1\end{pmatrix}$

$B=\begin{pmatrix}1&2\\ \:3&4\end{pmatrix}$

Calculating AB:

$\begin{pmatrix}1&-1\\ \:\:2&1\end{pmatrix}\times \:\begin{pmatrix}1&2\\ \:\:3&4\end{pmatrix}=\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}$

Multiply the rows of the first matrix by the columns of the second matrix

$=\begin{pmatrix}1\cdot \:1+\left(-1\right)\cdot \:3&1\cdot \:2+\left(-1\right)\cdot \:4\\ 2\cdot \:1+1\cdot \:3&2\cdot \:2+1\cdot \:4\end{pmatrix}$

$=\begin{pmatrix}-2&-2\\ 5&8\end{pmatrix}$

Hence,

$\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}=\begin{pmatrix}-2&-2\\ \:5&8\end{pmatrix}$

Therefore,

$\:c_{11}=-2,\:\:\:c_{12}=-2$

$\:c_{21}=5,\:\:\:c_{22}=8$

5 0

3 years ago

Read 2 more answers

HELP ASAP

iris [78.8K]

Answer:

177

Step-by-step explanation:

just answered this for someone else but the number of sit-ups is going up in 4s so just add four to 33 7 times since thats how many days she has left til 12th day

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3 years ago

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Brut [27]

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4 years ago

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vitfil [10]

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