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skelet666 [1.2K]
2 years ago
6

The Sydney Harbour Bridge is approximately 1200 metres long. A model of the bridge is built with a scale of 1:6000. What is the

length of the model?
Mathematics
2 answers:
DochEvi [55]2 years ago
8 0

Answer:

It spans about 500 metres (1,650 feet), making it one of the longest steel-arch bridges in the world. Along its length, it features four railroad tracks, a highway, and two pedestrian walkways.

Step-by-step explanation:

Guest
1 year ago
can you give a step-by-step explanation please
Vesna [10]2 years ago
8 0

Answer:

I am from India..........

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A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18 \pi18π18, pi
Whitepunk [10]

Answer:

A=81\pi $ m^2

Step-by-step explanation:

Circumference of the column =18\pi $ meters

Circumference of a circle=2\pi r

Therefore:

2\pi r =18\pi $ meters\\2r=18\\r=18 \div 2\\$Radius, r=9 meters

Area of a Circle =\pi r^2

Since radius of the cross section of the column =9 meters

Area of the cross section of the column

=\pi *9^2\\=81\pi $ m^2

5 0
2 years ago
A total of $150000 is invested in two funds paying 6.25% and 6% simple interest. If the total interest for the year is $9212.50,
Georgia [21]

Answer:

  • $85,000 at 6.25%
  • $65,000 at 6.00%

Step-by-step explanation:

Let x represent the amount invested at 6.25%. Then the total interest earned is ...

  0.0625x + 0.0600(150,000 -x) = 9212.50

  0.0025x = 212.50 . . . . . . subtract 9000, collect terms

  x = 212.50/0.0025 = 85,000

  150,000 - 85,000 = 65,000 . . . . amount invested at the lower rate

$85,000 is invested at 6.25%; $65,000 is invested at 6%.

3 0
2 years ago
The system on the left can be reduced to: t + u = 9 9t – 9u = –9 Solving the system t= , u=
LenaWriter [7]
We have that
<span>t + u = 9 --------> t=9-u-----------> equation 1
9t – 9u = –9----------> equation 2
</span>
I substitute 1 in 2
9*[9-u]-9u=-9
81-9u-9u=-9
18u=81+9
18u=90
u=90/18---------> u=5
t=9-u------> t=9-5----> t=4

the answer is
u=5
t=4




5 0
2 years ago
Read 2 more answers
Line jk passes through points j(-4,-5) and k(-6,3 if the equation of the lines is written in slope-intercept form,y=my+b what is
lidiya [134]
Written in 2-point form, the equation of the line is
  y = (y2-y1)/(x2-x1)·(x-x1) +y1
  y = (3-(-5))/(-6-(-4))·(x-(-4)) + (-5)
  y = 8/-2·(x +4) - 5
  y = -4x -21

The value of b is -21.

6 0
2 years ago
The human resources manager at a company records the length in hours, of one shift at work, X. He creates the probabity
faust18 [17]

Answer:

.84

Step-by-step explanation:

8 0
2 years ago
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