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Mandarinka [93]
3 years ago
6

What is the area of this plot in hectares?

Mathematics
2 answers:
Snowcat [4.5K]3 years ago
6 0

Answer:

Area of plot =Area of Square +Area of triangle

=300²+1/2×104×180

=90000+9360

=99360m²

Artemon [7]3 years ago
4 0

Answer:

The plot is made up of a rectangle and a trapezium:

Total area = area of rectangle+area of trapezium

{ \tt{area =  2(l + w) +  \frac{1}{2} h(a + b)}}

substitute:

{ \tt{area = 2 (300 + 196) +  \frac{1}{2} (300 - 196)(480 + 300) }} \\  \\ { \tt{area = 992 + 40560}} \\  \\ { \boxed{ \boxed{ \tt{ \:  \: area = 41552 \:  \:  {m}^{2}  \:  \: }}}}

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Please help me
madreJ [45]

Answer:

1) The total displacement vector is ((16 + √2)/2, -(6+11·√2)/2)

2) The number of miles they'd have to walk is approximately 13.856 miles

Step-by-step explanation:

1) The distance, direction, and location of the path of the walk the person takes,  are listed as follows;

Start location, (0, 0)

6 miles East walk to location, (6, 0)

6 miles Southeast to location, (6 + 3·√2, -3·√2)

3 miles South to location, (6 + 3·√2, -3·√2 - 3)

5 miles Southwest to location, (6 + 3·√2 - 2.5·√2, -3·√2 - 3 - 2.5·√2)

2 miles East to location, (6 + 3·√2 - 2.5·√2 + 2, -3·√2 - 3 - 2.5·√2)

(6 + 3·√2 - 2.5·√2 + 2, -3·√2 - 3 - 2.5·√2) = ((16 + √2)/2, -(6+11·√2)/2)

Therefore the destination coordinates is ((16 + √2)/2, -(6+11·√2)/2)

The total displacement vector, \underset{d}{\rightarrow} = ((16 + √2)/2, -(6+11·√2)/2)

d =  (16 + √2)/2)·i - (6+11·√2)/2)·j

2) If the person walked straight home, the number of miles they'd have to walk, \left |  \underset{d}{\rightarrow} \right |, is given as follows;

\left |  \underset{d}{\rightarrow} \right | = \sqrt{\left(\dfrac{16 +\sqrt{2}  }{2} \right)^2 + \left(-\dfrac{6 + 11 \cdot \sqrt{2}  }{2} \right)^2 } = \sqrt{134 + 41 \cdot \sqrt{2} }

Therefore;

If the person walked straight home, the number of miles they'd have to walk \left |  \underset{d}{\rightarrow} \right | \approx 13.856 \ miles

3 0
3 years ago
Can someone help me????
tatyana61 [14]

Answer:

all of them? or just like 1

7 0
3 years ago
Brooke is located 5 miles out at sea from a straight shoreline in her kayak. She wants to make it to the taco truck on the beach
jenyasd209 [6]

Answer:

x  =  1,2909  ml   (point where Brooke beaches her kayack)

Step-by-step explanation:

I did not find the indicated picture.  I design one  (See picture in Annex)

The route to follow by Brooke  is  x₁   +  x₂ and as we need to express total time.

s  (distance)  =  velocity* time    then     time t  =  distance / velocity

x₁  = √ (5)² + x²        ⇒  x₁  = √( 25 + x² )

and   x₂   =  (  6  -  x  )

x₁  = distance in kayack     ( speed 2 ml/h)

x₂  = distance walking       ( speed  4 ml/h)

Then total time as a function of x is

t(x)   =  √( 25 + x² ) / 2     +   (  6  -  x  ) / 4

Taking derivatives on both sides of the equation we get

t´(x)   =  2x* (2) / 4 *√( 25 + x² )  - 1/4

t´(x)   =  0       2x* (2) / 4 *√( 25 + x² )  - 1/4  = 0      x/√( 25 + x² ) - 1/4  = 0

x/√( 25 + x² )  = 1/4

x    =   √( 25 + x² ) /4

x²   =  (25 + x² ) /16

16*x²   = 25  +  x²

15x²   =  25          x  =  1,2909  ml   (point where Brooke beaches her kayack)

Then  walking distance is   x₂   =  6  - 1.2909    x₂  = 4.71 ml

5 0
3 years ago
A square garden has a perimeter of 68 m what is the area of the garden
Setler79 [48]

Answer:

the area is 289

Step-by-step explanation:

the formula for calculating the perimeter of a square is the side*4

68/4=17

the formula for calculating tha area is side*side

17*17=289

7 0
3 years ago
What percentage of the total students chose skateboarding?
Sergeu [11.5K]
I FOUND YOUR COMPLETE QUESTION IN OTHER SOURCES.
 PLEASE SEE ATTACHED IMAGES.

 For this case, the first thing we are going to do is add the number of students in each of the disciplines.
 We have then:
 walk = 9
 bike = 8
 skateboard = 3
 Total: 20
 The percentage sought is then:
 (3/20) * (100) = 15%
 Answer:
 
percentage of the total students chose skateboarding is:
 
D.) none of these

5 0
3 years ago
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