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kicyunya [14]
3 years ago
13

In 1979, zoologists estimated the number of fish in a local pond to be about

Mathematics
1 answer:
Leya [2.2K]3 years ago
6 0

Answer:

693 fish

Step-by-step explanation:

In 10 years, we can tell that the amount of fish increased by 1.833...(990 divided by 540) times. If we divide 1.833... by 10, we can find how much the pond increases by yearly. we get 0.1833... If we multiply that by 7 (because the gap between 1986 and 1979 is 7 years), we get 1.2833... So, if we multiply 540 by 1.28333..., we get 693 fish.

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Leno4ka [110]
The proportion pop/total = 5/7 is presumed to hold for the next 500 songs.

pop/500 = 5/7
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357 of the next 500 songs downloaded are expected to be pop songs.
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3 years ago
I NEED HELP ASAP<br> solve for u<br> 12.8=4u
pochemuha

Answer: u= 3.2

Step-by-step explanation:

divide both by 4

4 0
2 years ago
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Will give brainliest.
Lady bird [3.3K]

Answer:

x=8

Step-by-step explanation:

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3 years ago
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Use the net to compute the surface area of the three-dimensional figure.
Grace [21]

9514 1404 393

Answer:

  382 square units

Step-by-step explanation:

The central four rectangles down the middle of the net are 9 units wide, and alternate between 8 and 7 units high. Then the area of those four rectangles is ...

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The rectangles making up the two left and right "wings" of the net are 8 units high and 7 units wide, so have a total area of ...

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Then the area of the figure computed from the net is ...

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<em>Additional comment</em>

You can reject the first two answer choices immediately, because they are odd. Each face will have an area that is the product of integers, so will be an integer. There are two faces of each size, so <em>the total area of this figure must be an even number</em>.

You may recognize that the dimensions are 8, 8+1, 8-1. Then the area is roughly that of a cube with dimensions of 8: 6×8² = 384. If you use these values (8, 8+1, 8-1) in the area formula, you find the area is actually 384-2 = 382. That area formula is A = 2(LW +H(L+W)).

3 0
3 years ago
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adell [148]

Answer:

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Step-by-step explanation:

=2x^2-5x-3

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By taking common

=2x(x-3)+1(x-3)

=(2x+1)(x-3)

I hope this will help you :)

5 0
3 years ago
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