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algol13
3 years ago
15

A chain 18 feet long whose weight is 84 pounds is hanging over the edge of a tall building and does not touch the ground. How mu

ch work is required to lift the entire chain to the top of the building
Mathematics
1 answer:
coldgirl [10]3 years ago
8 0

Answer:

756 feet pound

Step-by-step explanation:

Length of the chain, L = 18 feet

weight of chain, W = 84 pound

If we lift the centre of gravity of the chain, it will entirely lift up. The centre of gravity of the uniform chain is at its mid point. So, the work done

W = weight x half of length

W = 84 x 9

W = 756 feet pound

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Identify the predictor variable and the response variable. A farmer has data on the amount of precipitation crops received and t
kow [346]

Answer:

The Predictor variable is the amount of precipitation received while the Response variable is the crop harvest.

Step-by-step explanation:

The Response variable in an experiment is the factor being measured or studied. They are also known as the dependent variables. Predictor variables are those values that explain the changes in the Response variable. They are also known as the independent variables.

In the question above, the amount of precipitation provides an explanation for the harvest of his crops. Therefore, the amount of precipitation can be rightly described as the predictor or independent variable, while the harvest of his crops is described as the response or dependent variable.

7 0
4 years ago
Jane cycles 27km at 12m/h. How long does she take?
emmainna [20.7K]
Every hour at 12km/h I would go 12km. Simple.

The distance traveled in km is equal to 12 times how many hours you go.

If I go 27 km, I can go in reverse and divide by 12 to get 2.25 hours.

A quarter of an hour is 15 minutes, so the answer would be 2 hours and 15 minutes.

6 0
3 years ago
Mary needs to order pizza for 18 students. Each student should get 1/4 of the pizza. How much pizza will be left over?
Inessa [10]

Answer:

Step-by-step explanation:

Answer:

Order 5 pizza's. There is  

1

2

a pizza left so someone gets an extra portion! Or it is split evenly!

Explanation:

No matter how you present this, the underlying principle is that of ratio.

If each pupil gets  

1

4

of a pizza the 1 pizza feeds 4 students.

So the ratio of  

pizza count

Student count

→

1

4

Need to have sufficient pizza for 18 students. The ratio will be constant so we have:

Let the count of pizzas be  

p

pizza count

Student count

=

1

4

=

p

18

So we now have:

 

p

18

=

1

4

Multiply both sides by  

18

giving:

18

×

p

18

=

1

4

×

18

18

18

×

p

=

18

4

But  

18

18

=

1

p

=

18

4

=

4

1

2

You can not order  

1

2

a pizza so the total pizza count is 5

4 0
3 years ago
(look at image) can i get help with this
tigry1 [53]

Answer:

  1. 7 and 1 vertically opposite angles
  2. 8 and 6 corresponding angles
  3. 1and 8 angles on a straight line
  4. 2 and 3 not sure interior angles
7 0
3 years ago
I have to estimate the product of 0.67 x 623 using compatible numbers..
Flura [38]
623 is close to 650 so you round that up to 650 and 0.67 is rounded to 0.65
650 x 0.65 = 422.5
Round 422.5 = 420

Your welcome :)
6 0
3 years ago
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