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3 years ago

1.5 x 0.3 = i’m desperate pls answer-

Mathematics

2 answers:

Natali5045456 [20]3 years ago

8 0

Answer:

Step-by-step explanation:

wolverine [178]3 years ago

4 0

Answer:

0.45

Step-by-step explanation:

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In a certain library the first shelf is 15.0 cm off the ground, and the remaining four shelves are each spaced 38.0 cm above the

baherus [9]

Answer:

1747.9 J

Step-by-step explanation:

The work done to lift a book by a certain height $\Delta h$ is

$W=mg\Delta h$

where

m = 1.40 kg is the mass of one book

$g=9.8 m/s^2$ is the acceleration due to gravity

The first shelf is 15.0 cm (0.15 m) from the ground, and it can be filled with 28 books. So, the work done to fill the first shelf is

$W_1=28mg\Delta h=28(1.40)(9.8)(0.15)=57.6 J$

The 2nd shelf is 38.0 cm above the first one, so its height from the ground is

$\Delta h =15.0+38.0 =53.0 cm=0.53 m$

It can also contain 28 books, so the work done to fill this shelf is

$W_2=28 mg\Delta h=28(1.40)(9.8)(0.53)=203.6 J$

The height of the third shelf is

$\Delta h =15.0+38.0 +38.0=91.0 cm=0.91 m$

It can also contain 28 books, so the work done to fill this shelf is

$W_3=28 mg\Delta h=28(1.40)(9.8)(0.91)=349.6 J$

The height of the 4th shelf is

$\Delta h =15.0+38.0 +38.0+38.0=129.0 cm=1.29 m$

It can also contain 28 books, so the work done to fill this shelf is

$W_4=28 mg\Delta h=28(1.40)(9.8)(1.29)=495.6 J$

The height of the 5th shelf is

$\Delta h =15.0+38.0 +38.0+38.0+38.0=167.0 cm=1.67 m$

It can also contain 28 books, so the work done to fill this shelf is

$W_5=28 mg\Delta h=28(1.40)(9.8)(1.67)=641.5 J$

Therefore, the total work done is:

$W=W_1+W_2+W_3+W_4+W_5=57.6+203.6+349.6+495.6+641.5=1747.9 J$

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4 years ago

I have no idea on how to do this using calculus. I know how to do it on a calculator but my teacher wants some sort of actual wo

Cerrena [4.2K]

you can use integration

I could have done It by typing it here is hectic. you can inbox you email so that I send you scanned answer

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3 years ago

How to do!!!<br> please help

Margarita [4]

Step-by-step explanation:

Supplementary angle adds up yo 180°

So angle 2 is supplementary to angle 3

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frutty [35]

Hello!

I have all the work but I do not know how to post it on here.

The area of the figure shown is 57.

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A bank account earns interest at a rate of 3.5% per year ( in other words it increases in value by that percent) and starts with

LenKa [72]

Annually cumulating interest can be determined by the following formula:

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4 years ago