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N76 [4]
3 years ago
13

If a circle has a circumference of 81.64 cm, what is the radius?

Mathematics
2 answers:
ipn [44]3 years ago
8 0

Answer:13cm

Step-by-step explanation:

Over [174]3 years ago
8 0

Answer:

c = Circumference=pid= 81.64   To find the radius of a circle you can just divide the diameter by 2.

pi = 3.14

d = diameter=c/3.14                  Pi is always 3.14 or 22/7.

d = 81.64/3.14

d = 26

r= radius= 26/2

radius=13 cm

Step-by-step explanation:

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Please help!!! it would be much appreciated
AveGali [126]

Answer:

12/13, or answer choice B

Step-by-step explanation:

Ok first lets find the lengths of this triangle. We know 2 lengths already, 5 and 12. By using the pythagorean theorem, a^2+b^2=c^2, we can figure out that the third side is 13 units long.

Math:

5^2+12^2=169

25+144=169

And the square root of 169 is 13, meaning that the hypotenuse of the right triangle is 13.

To remember what SIN TAN and COS mean, you can use this helpful phrase: SOH CAH TOA

SOH: It means that SIN is OPPOSITE OVER HYPOTENUSE

CAH: it means that COS is ADJACENT OVER HYPOTENUSE

TOA: It means that TAN is OPPOSITE OVER ADJACENT

because it asks for SIN B, we need to do OPPOSITE OVER HYPOTENUSE.

Because the side opposite to angle B is 12 units, and the hypotenuse is 13 units, the answer is 12 over 13 units, or 12/13.

I hope my answer helped!

If this helped you, please vote brainliest. Thanks!

8 0
2 years ago
Read 2 more answers
What is the equation for this trig function?
Georgia [21]

Answer:

A. y = cos x

Step-by-step explanation:

The function that we see graphed has the point (0,1), this means whichever trig function f(x) it represents f(0) = 1.

Now, only the cosine function has the property that cos(0) = 1, thus choice A is the correct answer.

Step-by-step explanation:

5 0
3 years ago
Change 4700g into kilograms
svetlana [45]
The answer is.......
 
4.7

3 0
3 years ago
Read 2 more answers
(15y^0 x^-3 z^2/ 3x^3 y^7 z^1/2)^2
ArbitrLikvidat [17]
Hello! For this you are just going to do this step by step, and remember to use PEMDAS. That is the order in which you should do the math. The abbreviation stands for  Parenthesis, exponents, multiplication, division, addition and subtraction. So lets get started!
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Hope this helps!! If you need any more help or further explanation just let me know!! :)
 

6 0
3 years ago
Hal earns n dollars per hour. Next month he
xenn [34]

Answer:

Total = 1.02n

Step-by-step explanation:

Given

Earnings = n

Raise = 2\% --- <em>not 296</em>

Total = n + 0.02n

Required

Simplify the expression for total earning

The total amount is derived from:

Total = Earnings + Raise * Earnings

Total = n + 2\% * n

Express percentage as decimal

Total = n + 0.02 * n

Now, we can solve further:

Total = n + 0.02n

Total = 1.02n

<em>Hence, the simplified expression is 1.02n</em>

8 0
3 years ago
Read 2 more answers
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