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AleksAgata [21]
3 years ago
10

Over the past several months,the water level of a lake has been decreasing by 12% each week.If the highest water level before th

e decrease started was 520ft.What was the level at the end of 2 weeks?
Mathematics
1 answer:
pickupchik [31]3 years ago
8 0

Answer:

The level was 402.7ft. at the end of two weeks.

Step-by-step explanation:

First, we need to find the amount of decrease for the first week.

520 x 0.12 = 62.4

Now, we subtract the change for the first week.

520 - 62.4 = 457.6

Next, we find the change for the second week.

457.6 x 0.12 = 54.912

Then, we subtract the change for the second week.

457.6 - 54.912 = 402.688

And we are left with our final answer that is 402.688ft. or if you wish to round to the nearest tenth, then your answer would be 402.7ft.

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The surface area (SA) of a cube can be written as:

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From here we can write, the length of the side s as:

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For cube with surface area 768 square inches, the side length will be:

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3 years ago
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Answer:

28

Step-by-step explanation:

Since B is the midpoint of AC, that means AB = BC. That means 3x+4 = 5x-6. We can now set up an equation to solve for x:

3x+4 = 5x-6

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