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Decreased by 20%=100%-20%=80%

Increased by 25%, 25/100*80=20, so 80+20=100%

Thus, there is no change, .\(0\%\)

Yes, thank you, guest, forgot about that!!!

So, both are 6/10, thus \(\frac{6}{10}*\frac{6}{10}=\frac{9}{25}\).

And for the red, \(\frac{4}{10}*\frac{4}{10}=\frac{4}{25}\).

Thanks again, guest!

There are 6 green balls and 4 red balls, making 10 total balls. The probability of picking a green ball first is \(\frac{6}{10}\) .

Since there are replacements, there will be still 10 balls in the bag. Now, for the second draw, you pick green again; making the probability, \(\frac{5}{10}\) . So, the probability of picking a green ball both times is \(\frac{6}{10}*\frac{5}{10}=\frac{30}{100}=\frac{3}{10}\) .

Next, the probability of picking a red ball is \(\frac{4}{10}\) . Doing the same as before, we get: \(\frac{4}{10}*\frac{3}{10}=\frac{3}{25}\) .

I'm leaving the next step up to you, to solve... What can we do after this?

If it takes 68 meters per minute for the ship's ascent, the question is asking us to find how many minutes it will take reach 631 meters.

First, the ship is at a depth of 1583 meters, so to reach 631 meters, it has to go: \(1583-631=952\) meters.

We also have our proportion: 68 meters every 1 minute, so 952 meters in \(\frac{952}{68}=\boxed{14}\) minutes.

The initial volume of tank: \(40*25*30=30,000\) inches^3

The depth of 24 inches: \(40*25*24=24,000\) inches^3

If the rock, with a volume of 500cm^3, is put in, the total volume will be:\(24,000+500=24,500\) icnhes^3

We know that our aquarium is 40 inches long, and 25 inches wide, so we have to find the height, that will equal our volume of 24,500 icnhes^3.

So, \(40*25=1000\), and inches\(\frac{24500}{1000}=24.5 \). We know that our initial height was 24 inches, thus \(24.5-24=\boxed{0.5}\) inches increase.

Here's an example: Dan has 7 2/3 meters of yarn and his friend, Evan, has 4 1/15 meter of yarn. What is the difference between these two amounts of yarn? 

The formula to find the number of diagnols in a polygon is \(\frac{n(n-3)}{2}\).

Since we have 10n for the number of diagnols, we get: \(\frac{n(n-3)}{2}=10n\).

Taking 2 to the other side, we get: \(n(n-3)=20n\).

Dividing n on both sides, we get: \(n-3=20\)

This means that \(\boxed{n=23}\).

First, in Harry's point of view: 3 sisters and 5 brothers

And, in Harriet's point of view: 2 sisters, (3-1), 6 brothers, (5+1)

So, the product of S and B is, \(S*B=6*2=\boxed{12}\).

Take a look at this link, and see if you can get an idea:

https://math.stackexchange.com/questions/227451/number-of-distinct-centroids-of-triangles-formed-by-40-equally-spaced-points-on

More detail: Since the question is asking us, how many times does 8 go into 4, we have to convert this statement into a fraction.

Analyzing, we get: \(\frac{4}{8}=\frac{1}{2}\)