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r-ruslan [8.4K]
3 years ago
5

What is the perimeter of a rectangle with a. Length of 13 feet and a width of 9 feet

Mathematics
2 answers:
Alex Ar [27]3 years ago
8 0
13+13+9+9=44ft that's the perimeter
lisabon 2012 [21]3 years ago
5 0
13 + 13 + 9 + 9
The perimeter is 44
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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.

But before then, we should know that sum of angles in a triangle is equal to 180°

Therefore,

20° + 50° + b° = 180

70° + b = 180

b = 180° - 70°

b = 110°

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

Adjacent = 3.5 / 1.43

Adjacent = 2.44km

The height of the bird is 2.44km

7 0
3 years ago
Find the length of the missing
Ivahew [28]

Answer:

12

Step-by-step explanation:

using pythagoras theorem

here 15 is hypotenuse since it is opposite 0f 90 degree

9 and x are the other smaller sides of a triangle

according to pythagoras thorem the sum of square of two smaller sides of a triangle is equal to the square of hypotenuse. So,

9^2 + x^2 = 15^2

81 + x^2 = 225

x^2 = 225 - 81

x^2 = 144

x = \sqrt{144

x = 12

5 0
2 years ago
Read 2 more answers
The given information were that Robi has run the first 4 miles of a race in 30 minutes and she reached the 6 mile point after 45
strojnjashka [21]

Answer:

Positive

Step-by-step explanation:

Slope: (6-4)/(45-30)

= 2/15

6 0
3 years ago
What is the mean and MAD of this data set?<br>​
Hitman42 [59]

Answer:

Mean:6

Mad:2.29

Step-by-step explanation:

7 0
3 years ago
Find the volume of this sphere.<br> Use 3 for TT.<br> V<br> V [?]ft3<br> V = Tr3<br> 16ft
Vedmedyk [2.9K]

Answer:

well the volume of a sphere is V = 4/3 x pie x r3 so the radius is half of the diameter so that would be 8 not going to show work but the answer is 2144.66

8 0
3 years ago
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