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andrew-mc [135]
3 years ago
6

Please help find surface area!!

Mathematics
1 answer:
NeTakaya3 years ago
3 0

Answer:

138 cm.

Step-by-step explanation:

So first, we find the S.A. of the front and back.

The diagram says the side length of the front is 3 cm. and 3 cm.

3x3=9. So then, the back is also 9 cm, 9+9=18.

Now to find the S.A.'s of the four sides, you have to see the side lengths of each of them. The side lengths are 3 and 10.

3x10=30. This means each of them is 30 cm.

30x4=120. 120 is the total surface area of the four sides.

To find the total surface area of the whole rectangle, you add all the surface areas.

120+18=138 cm. (Not squared, since it's surface area and not area.)

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A bolt falls off an airplane at an altitude of 500 m. How long will it take the bolt to reach
Rudik [331]

Answer:

t = sqrt(500/4.9) =~ 10.1 seconds/ Answer: 10.1015 seconds (this is approximate)

Step-by-step explanation:

Use 4.9t^2 + v0t = s

a) A bolt falls off an airplane at an altitude of 500 m. Approximately how long does it take the bolt to reach the ground?

s = 4.9t^2 + v0t = 500

4.9t^2 = 500

t = sqrt(500/4.9) =~ 10.1 seconds

Part A)

v = initial velocity = 0

s = 500 = vertical distance the object travels (from plane to ground)  

Plug in the given values and solve for t

4.9t^2 + v*t = s

4.9t^2 + 0*t = 500

4.9t^2 + 0 = 500

4.9t^2 = 500

t^2 = 500/4.9

t^2 = 102.04081632653

t = sqrt(102.04081632653)

t = 10.101525445522

t = 10.1015

Answer: 10.1015 seconds (this is approximate)

8 0
2 years ago
PLEASE HELP!!! WILL GRANT BRAINLIEST IF CORRECT, NEED NOW
Vinil7 [7]

Answer:

B

Step-by-step explanation:

For each equation, set x to 0.  A is correct because if x=o, then y will equal 38.910.

5 0
3 years ago
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Nataly [62]

Answer:

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4 0
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Human capital deepening refers to increases in a country’s population, including both births and immigration.
frozen [14]

Answer:

Based on what I researched that would be False.

Step-by-step explanation:

Human capital deepening is the increase of capital workers, it also includes skills or higher education.

4 0
2 years ago
What is AE? Please help me
shepuryov [24]
The two triangles are similar, so will have a direct scale factor. We can find this by using the given measurements, 10÷8=1.25. So the scale factor from the smaller to the bigger triangle is 1.25. This means that 1.25×(x+6)=AE. We can solve this as we would with a regular linear equation:
1.25(x+6)=2x+6
1.25x+7.5=2x+6
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2=x
∴ AE is 2x+6=10
4 0
3 years ago
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