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yulyashka [42]
3 years ago
12

What is the surface area of a cube whose edges are 11 inches long?

Mathematics
1 answer:
Pepsi [2]3 years ago
7 0
11 * 11 * 6 = 726 square inches
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Can you answer this for me plssss 0.5(r+2.75)=3
lora16 [44]

Step-by-step explanation:

0.5 ( r + 2.75 ) = 3

r + 2.75 = 3 / 0.5

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Susan and Mark are standing at different places on a beach and watching a bird. The angles of elevation they make are 20º and 50
Mandarinka [93]

Answer:

The bird is 2.44km high

Step-by-step explanation:

Hello,

To solve this question, we need to understand how they are and we can only get this with a correct pictorial diagram.

See attached document for better understanding.

From the first diagram, we understand that the bird is between them and also on top of them.

Assuming Susan, Mark and the bird all form a triangle at each other and the bird at the top, we can divide the the triangle into two equal parts.

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70° + b = 180

b = 180° - 70°

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Dividing angle b into two equal parts = 55° on each side.

See the last attached document for better illustration.

Using SOHCAHTOA, we can find the adjacent of the triangle which corresponds to the height of the bird.

We have opposite = 3.4km and we're looking for adjacent. We can use tangent of the angle to find the adjacent.

Tanθ = opposite / adjacent

Tan 55° = 3.5 / adj

Adjacent = 3.5 / tan55

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The height of the bird is 2.44km

7 0
3 years ago
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Brilliant_brown [7]

Answer:

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the nth term is given by arⁿ⁻¹

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nth term, an = -4 . 2ⁿ⁻¹

3 0
3 years ago
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