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iVinArrow [24]
2 years ago
13

Find the area of the circle with a circumference of

Mathematics
1 answer:
Anton [14]2 years ago
8 0

Answer:

706.50 mm^2

Step-by-step explanation:

The formula to find the circumference is 2πr (r : radius)

if the circumference is 30π the the radius is = 15

to find the area we use the following formula :

π*r^2

r = 15 and π is given as 3.14

(3.14)*15^2 = 706.50 mm^2

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If a polynomial function f(x) has roots 6 and square root of 5, what must also be a root of f(x)?
ivolga24 [154]

Answer:

-\sqrt{5}

Step-by-step explanation:

A root with square root or under root is only obtained when we take the square root of both sides. Remember that when we take a square root, there are two possible answers:

  • One answer with positive square root
  • One answer with negative square root

For example, for the equation:

x^{2}=3

If we take the square root of both sides, the answers will be:

x=\sqrt{3} \text{ or } x= -\sqrt{3}

Only getting one solution with square root is not possible. Solutions with square root always occur in pairs.

For given case, the roots are 6 and \sqrt{5}. Therefore, the 3rd root of the polynomial function f(x) had to be -\sqrt{5}

It seems you made error while writing option B, it should be - square root of 5.

4 0
3 years ago
Which choice shows 1/4 of 8
yulyashka [42]

Answer:

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5 0
3 years ago
A function has a constant tripling time. What type of function does this represent?
Olenka [21]
This would be an exponential function.

Exponential functions are of the form 

y = a*bˣ, where a is the initial value, b is the rate the function changes by, and x is the time period.  Since this triples, b would be 3.
5 0
3 years ago
Read 2 more answers
2,548 rounded to the nearest hundred
AnnZ [28]

Answer:

the answer is  2,500

Step-by-step explanation:

any number higher than 5 you round up but any number lower than 5 you round down.

4 is lower than 5 so you round it down and the 5 stays the same, and replace it with 0's.

5 0
2 years ago
Tanya runs 8 km in 60 minutes at this rate how long would it take her to run 2 kilometers
Marysya12 [62]

The Answer is 15 minutes.

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3 years ago
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