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antoniya [11.8K]
3 years ago
13

A railway engine is of mass 72tonnes and 11m long. An exact scale model is made of it and is 44cm long. find the mass of the mod

el​
Mathematics
2 answers:
jolli1 [7]3 years ago
7 0

Answer:

46 will be converted to .44m

x will be the mass of the 44 cm engine

x/72  =  .44^3/11^3

x/72 = 0.085/1331

cross multiply

1331x = 72 x 0.085

1331x = 6.12

x= 6.12/1331

=0.004598

x = 0.004598  tonnes

change to kilograms

0.004598*1000 = 4.6 kg

34kurt3 years ago
4 0

Answer:

it is correct

Step-by-step explanation:

2000 N

The resistance force acting is 1N per ton.

Tension in the coupling between engine and the wagon is 2000N.

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vlabodo [156]

Answer:

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Step-by-step explanation:

<u><em>The options of the question are</em></u>

A) The population density decreases each year.

B) The population density increases each year.

C) The population density remains constant.

D) The population alternates between increasing and decreasing

we have

a_n=2.9(a_n_-_1)-0.2(a_n_-_1)^2

a_1=8

Find the value of a_2

For n=2

a_2=2.9(a_1)-0.2(a_1)^2

a_2=2.9(8)-0.2(8)^2=10.4

Find the value of a_3

For n=3

a_3=2.9(a_2)-0.2(a_2)^2

a_3=2.9(10.4)-0.2(10.4)^2=8.528

For n=4

a_4=2.9(a_3)-0.2(a_3)^2

a_4=2.9(8.528)-0.2(8.528)^2=10.1858

For n=5

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7 0
3 years ago
Read 2 more answers
The length of a rectangle is six times its width.
Hoochie [10]

Answer:

Length = 30

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Step-by-step explanation:

So the formula for perimeter is

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And we know that:

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So then we put in all the information that we do know

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So now we put that information into L = 6W to get:

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Answer:

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3 years ago
Joan has a square flower bed with a side length of 5 meters filled with tulips. there are a total of 375 tulips in the bed. find
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