The circumference of every circle is (pi) times (diameter).

The diameter is (2 x radius), so we can write

Circumference = (pi) x (2 x radius) .

The question gives us the circumference, and the number to use for (pi).
I shall now pluggum in:

(31.4 cm) = (3.14) x (2 x radius)

Divide each side by 3.14: (31.4 cm)/(3.14) = 2 x radius

Divide each side by 2 : (31.4 cm) / (2 x 3.14) = radius

5 cm = radius

8 0

2 years ago

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I need help asappppppppppppp

svetoff [14.1K]

Answer: Choice [D] - "power of a power" ✅

Step-by-step explanation:

Hii, do you need to know which law you should use to simplify $\sf\bigg(x^4\bigg)^9$ ?

No problem!

The law we will use here is "power of a power".

What "power of powers" means is we raise a power to a power, which is exactly what we do here: We raise x^4 to the power of 9. To simplify our expression, we multiply the powers. ( $\boldsymbol{4\cdot9}$ )

So the right answer is: Choice [D] - "Power of a power"

The simplified answer is $\LARGE\boldsymbol{x^{4\cdot9}=x^{36}}$

Voila! There's our answer, cheers!

Hope that this helped! Best wishes.

$\it Reach\;far.\;Aim\;high.\;Dream\;big.}$

7 0

1 year ago