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aalyn [17]
3 years ago
13

A cube has a side length of 20.5 cm .what is the surface area of the cube?

Mathematics
2 answers:
valentinak56 [21]3 years ago
7 0

Answer:

2521.5 cm²

Step-by-step explanation:

A cube has 6 equal, square sides.

If the side length is 20.5 cm, then the area of one side is (20.5 cm)², or 420.25 cm².

The total surface area of the cube is thus 6(420.25 cm²) = 2521.5 cm²

Nitella [24]3 years ago
6 0

To sum up, we only have the length of one side.

We need to find the width of the same side. -

20.5 x 20.5 = 420.25

To get the surface area, we multiply by six.

<u>Why?</u> There are six sides on a cube.

420.25 x 6 = 2521.5

Answer: 2521.5 cm

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3 years ago
A washing machine sells for $201 after being discounted by 40 percent. What was the original price of the washing machine?
olga_2 [115]

Step-by-step explanation:

Let original price be x

Price after 40% discount is $201

Therefore

x × 40% = $201

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Therefore, the original price is $502.5

Hope it helps :)

5 0
3 years ago
Question 1 options:
OLEGan [10]

Answer:

4000 m^{3}

Step-by-step explanation:

V = 1/3(Bh)  where B is the area of the base and h is the height of the pyramid

B = 20(20) = 400      h = 30

V = 1/3(400)(30) = 4000 m^{3}

5 0
2 years ago
Help Please!!!!!!!!​
VladimirAG [237]

Answer:

$14.50 I'm positive.

Step-by-step explanation:

Rented one time shoes: $2.75

One game of bowling: $2.50*4 games of bowling

4 games of bowling is $10

  • $2.75+$10

One nachos: $1.75*2 orders of nachos

2 orders of nachos is $3.50

  • Half price of nachos, so 3.50/2 which is 1.75.
  • $2.75+$10+$1.75= <u>$14.50</u>

HOPE THIS HELPED :)

3 0
3 years ago
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