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Vilka [71]
3 years ago
14

What is the best approximation for the circumference of a circle with a radius of 125 m?

Mathematics
2 answers:
ANEK [815]3 years ago
8 0

Answer:

Option B is correct

circumference of a circle is 785 m

Step-by-step explanation:

Circumference of the circle(C) is given by:

C = 2\pi r

where

r is the radius of the circle

As per the statement:

radius of the circle is 125 m

then substitute in [1] we have

C = 2 \cdot 3.14 \cdot 125

Simplify:

C = 785 m

Therefore, the circumference of a circle is 785 m

ikadub [295]3 years ago
6 0
We know, Circumference = 2πr
So C = 2 * 3.14 * 125
C = 785 m

In short, Your Answer would be Option B

Hope this helps!
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If x varies directly with y and y is 10 when x is 8, what is x when y is 18?
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Knowing that x varies directly with y, we know the basic skeleton of the equation is y = mx. 

To find m, plug in the known coordinate (8,10), where the x-coordinate is 8 and the y-coordinate is 10.
y=mx \\ 10=m8 \\ (10)/8=(8m)/8 \\ m= \frac{10}{8} = \frac{5}{4}

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Finally, plug in the y-coordinate 18 to the equation and solve for x!
y= \frac{5}{4}x \\ 18= \frac{5}{4}x \\  \frac{4}{5}(18)=( \frac{5}{4}x) \frac{4}{5} \\ x= \frac{4*18}{5}  \\  x= \frac{72}{5}

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