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Lena [83]
3 years ago
6

If a circle has a diameter of 4 inches, what is the area?

Mathematics
2 answers:
gulaghasi [49]3 years ago
7 0
The formula for area of a circle is π × radius^2, and to find the radius we can just divided the diameter by 2 and get 2 inches. You don't need to use a calculator here, because π is approximately equal to 3.14, so 3.14 × 2^2 = 12.56, which is answer B. I hope this helps!
Dafna11 [192]3 years ago
6 0

Answer:

50.24

Step-by-step explanation:

i got it wrong on study Island

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Given that,

The camera sights the stadium at a 7 degree angle of depression.

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Solution,

If we consider a right angled triangle. Let x is its hypotenuse i.e. the line of sight distance from the camera to the stadium. Using trigonometry :

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Which values of k are solutions to the inequality StartAbsoluteValue negative k minus 2 EndAbsoluteValue less-than 18? Check all
Stella [2.4K]

Answer:

You could just replace all the given possible values of k in the inequality and see which ones are solutions, but let's solve this in a more interesting way:

First, remember how the absolute value works:

IxI = x if x ≥ 0

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Then if we have something like:

IxI < B

We can rewrite this as

-B < x < B

Now let's answer the question, here we have the inequality:

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Then we can rewrite this as:

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Now let's isolate k:

first, we can add 2 in the 3 parts of the inequality:

-18 + 2 < -k - 2 + 2 < 18 + 2

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Now we can multiply all sides by -1, remember that this also changes the direction of the signs, then:

-1*-16 > -1*-k > -1*20

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Then k can be any value between these two limits.

So the correct options (from the given ones) are:

k = -16

k = -8

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What is cos of negative pi/3?<br> what is sin of negative pi/3?
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