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3 years ago

SOMEONE DO 7,8, AND 9. ILL GIVE BRAINLIEST

Mathematics

2 answers:

Aleonysh [2.5K]3 years ago

8 0

Answer:

7)8:45

8)12:30

9)3:15

Step-by-step explanation:

thanks, please mark brainliest

Basile [38]3 years ago

7 0

Answer:

7 is 9:43 8 6:03 9 i couldn't see that good so 3:17

Step-by-step explanation:

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if the area of a circle is represented by A=21π, what is the radius of the circle? round your answer to the nearest tenth

Reptile [31]

The equation is actually
circle area = PI * radius^2
radius = square root (area / PI)

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4 years ago

What are the number of real zeros and complex zeros?

Karo-lina-s [1.5K]

Answer:

Step-by-step explanation:

There is/are :-

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2 years ago

Read 2 more answers

Pls help faaaast. i ll mark brainliest

kenny6666 [7]

Answer:

no, the perimeter will not change

Step-by-step explanation:

because the circle is changed into that shape. here, only shape is different not perimeter

6 0

3 years ago

The circumference of a circle is 7π m. what is the area

Helen [10]

Answer: 38.4845100065m²

when rounded to the nearest tenth: 38.5m²

when rounded to the nearest hundredth: 38.48m²

when rounded to the nearest thousandth: 38.485m²

Step-by-step explanation:

the formula for finding the area of a circle is $A = \pi r^{2}$ , where A = area and r = the radius of the circle.

since you're only given the circumference, we need to calculate the radius of the circle before we can find the area.

to find the radius of a circle, you can either divide the measure of the diameter by 2 OR use the formula $r=\frac{C}{2\pi}$ where r = radius and C = circumference.
because there is no given diameter measurement in your question, the best way to find the radius is to use the formula $r=\frac{C}{2\pi}$ .

first, plug the given values into the equation.

since $7\pi$ is the given circumference, plug in $7\pi$ for $C$ .

$r=\frac{C}{2\pi}$ ⇒ $r=\frac{7\pi}{2\pi}$

the equation becomes $r=\frac{7\pi}{2\pi}$ , aka radius equals seven times pi divided by two times pi.

now divide $\frac{7\pi}{2\pi}$ .

$\frac{7\pi}{2\pi} = 3.5$

now we know that the radius of the circle is 3.5 :) since we have this information, we can now solve for the area of the circle using the formula $A = \pi r^{2}$ .

first, plug in $3.5$ for $r$ .