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3 years ago

Last year 200 students participated in the Coastal Clean-Up.This year,260 students participated.What was the percent of change?

Mathematics

1 answer:

timofeeve [1]3 years ago

7 0

Answer:

30%

Step-by-step explanation:

Given the following data;

Old value = 200

New value = 260

We will calculate the change using;

$Change = new \; number - old \; number$

Substituting the values, we have;

$Change = 260 - 200$

Change = 60

Mathematically, percentage change is given by the formula;

$Percentage \; change = \frac{increase}{original \; number} * 100$

Substituting into the equation, we have;

$Percentage \; change = \frac{60}{200} * 100$

$Percentage \; change = 0.3 * 100$

Percent change = 30%

Therefore, the percent change is 30%

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3 years ago

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Answer:

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$R(x)=-0.5x^2+800x-100$

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Therefore, the total profit P(x) or the month is $P(x)=-0.5x^2+500x-350$ .

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3 years ago

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Answer: ∛v

Step-by-step explanation:

Since we know volume is measured height x width x length, we know the equation we'd use here would be:

___ x ___ x ___ = v in³

If this was area, we would have ___ x ___ = v in², and it would be easy to find each blank. You would just find the square root of "v", making your answer √v.

When you have 3 things multiplied by each other (that are exactly the same, which is the situation here since this is a cube), you will want to find ∛x (if x is our unknown variable). This means that we are finding ONE-THIRD of the number ... sort of. So if x was equal to 8, then ∛x = 2, because 2 x 2 x 2 = 8.

In our situation here, x = v, and since we don't know the actual number, we will keep it as a square root, so the answer to your question is ∛v.

I really hope I was able to explain easy enough, feel free to ask anything else!

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