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babymother [125]
3 years ago
8

In a circle, what does the ratio A/r^2 represent?

Mathematics
1 answer:
Pepsi [2]3 years ago
5 0
The ratio A/r² would represent \pi which is the circumference of a circle divided by its diameter.

You can see this because the area of a circle is \pir² and if you divided that by the radius squared, you are given pi which is the circumference of a circle divided by its diameter.
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Jessica wants to give a 20% tip to a taxi driver. If the fare is $23.78, what amount did she tip the driver?
dedylja [7]
You should mulitply. $23.78 * 0.20 = 4.756

 Then you add. 4.756 to $23.78 = $28.536

Now you round $28.536 to the hundredths so that you can pay it with coins. 

The anwser is  $4.76 and the total amount for the taxi ride would be $28.54
7 0
3 years ago
If f(x) = x^2+x-3, then f(3a) =
zvonat [6]

Answer:

A

Step-by-step explanation:

With functions all you need to do is substitute in the passed value for x.

4 0
3 years ago
What the expression (4f-3+2g)-(4g+2)
galben [10]
For this question you can say: 
4f -3 +2g - 4g -2
so now you can simplify and find the answer:
4f -3 -2g -2 = 4f -2g -5
and that's the answer :)))
I hope this is helpful
have a nice day 
8 0
3 years ago
The following table shows the number of feet a bird flies above the ground as a function of time: (In the picture)
Otrada [13]

Answer:

  D.)  (14, 0); the time it takes for the bird to reach the ground

Step-by-step explanation:

The attached graph shows a plot of the table values and the two offered solution options.

The dependent variable in this scenario is the bird's height above the ground. When that is zero, the bird is on the ground. This fact makes choices B and C seem ridiculous.

We note from the table and graph that the bird is on a path that decreases in height by 3 feet every 2 seconds. If the bird continues that rate of descent, it will reach the ground after 14 seconds.

That is, its (time, height) pair will be (14, 0), matching choice D.

_____

Choosing any answer to this question requires making assumptions that are inconsistent with real-world bird behavior. At least, the problem statement should say what assumptions are applicable.

4 0
3 years ago
Read 2 more answers
If you borrow $225 for eight years at an interest rate of 6% how much interest will you pay ?
weeeeeb [17]

Answer:$58.55

Step-by-step explanation:


4 0
4 years ago
Read 2 more answers
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