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Phantasy [73]
3 years ago
8

PLEASE HELP! I WILL MARK YOU AS BRAINLIEST!

Mathematics
1 answer:
lesya692 [45]3 years ago
5 0

Answer:

33%

Step-by-step explanation:

This question involves working with areas.

The area of a circle is πr².

With this in mind, let's proceed to label our circles.

From order of smallest to largest, we'll label them A, B and C.

Area for circle A = π(4)² = 16π

Area for circle B = π(4+3)² = π7² = 49π

Area for circle C = π(4+3+3)² = π10² = 100π

Now let's label the rings.

The blue shaded area will be ring K and the outer, larger, ring, L.

To find the area of ring L, we must subtract the area of B from C.

L = C - B

L = 100π - 49π

L = 51π

Now to find the area of ring K, we'll subtract the area of our circle A, and our ring L.

K = C - A - L

K = 100π - 16π - 51π

K = 33π

We now know that the blue shaded area has a total area of 33π. We also know that the full area of the logo is the same area of Circle C, 100π. To find the percentage, we simply divide.

Percentage of K = \frac{K}{C}

Percentage of K = \frac{33\pi}{100\pi}

Percentage of K = \frac{33}{100}

Percentage of K = 33%

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-----------------------------------------------------

angle AEB = angle GEC
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angle GEC = 25 degrees

Angle FEG = 90 - (angle GEC)
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timurjin [86]
The <span>given the piecewise function is :
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f(x) = \[ \begin{cases} &#10;      2x & x \ \textless \  1 \\&#10;      5 & x=1 \\&#10;      x^2 & x\ \textgreater \ 1 &#10;   \end{cases}&#10;\]

To find f(5) ⇒ substitute with x = 5 in the function → x²
∴ f(5) = 5² = 25


To find f(2) ⇒ substitute with x = 5 in the function → x²
∴ f(2) = 2² = 4

To find f(-2) ⇒ substitute with x = 5 in the function → 2x
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8 0
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Eduardwww [97]
<h2>QUESTION</h2>

What is 33% of 400?

<h2>ANSWER AND EXPLANATION</h2>

To find the percent of a number, you have to change the percent into a decimal or a fraction and multiply by the number.

<h3>DECIMAL</h3>

To change a percent into a decimal, remove the percent sign and move the decimal point 2 places to the left.

33 \% \rightarrow 0.33

Now that you have your decimal, multiply by 400:

0.33 \times 400 = 132

ANSWER = 132

<h3>FRACTION</h3>

To change a percent into a fraction, make the percent number as the numerator(top number) and 100 as the denominator(bottom number) since fractions are out of 100.

33 \% \rightarrow \frac{33}{100}

Now that you have your fraction, multiply by 400:

\frac{33}{100} \times 400 = \frac{13200}{100} \rightarrow 132

ANSWER = 132

<em>If you have any questions, feel free to ask in the comments! :)</em>

4 0
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ehidna [41]
Answer:

I believe it is, 30 minutes of running.

Explanation:

If she spends 12 minutes walking, that means she’s done 6 ‘sets’ of two minutes.

Then, you just have to multiply 6 by 5 and then you get 30.
5 0
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