Find the exact circumference. D=19.7 cm

Answers

Answer 1

Answer: The exact circumference is 19.7 pi. It can't be completely written with numbers, because pi can't.

Answer 2

Answer: C= D * $\pi$
D= 19.7cm

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500 people fill up 4/9 of the hall. What is the seating capacity of the hall?

Answers

the answer would be 1125 because you have to divide 500 by 4 then multiply it by 9

If 4/9 of the hall hold 500 people, then 1/9 of the hall holds 125 people.
Times that by 9 and you have your answer which is 1125 people.

Is 35 in , 45 in , 55 in, a right triangle or not

Answers

If its less than 90, its a right triangle. Hope this helps!

How is the area of a sail related to the weight of the pilot on a hang glider?

Answers

The correct answer is:

The larger the surface area of the sail, the heavier the pilot can be and safely use the glider.

Explanation:

A hang glider must be able to support the weight of the pilot. The air pushing up under the sail (wing) of the glider helps support the weight. The more sail (wing) that you have, the more air pushing up, and the more weight it can hold.

The area of the sail is correlated to the weight of the pilot on the hang glider because the surface area of the sail needs to be able to lift ≤ (greater than or equal to) weight of the pilot.

Need help with #4 please! Serious answers please. Photo attached.

Answers

Answer:

student 2

Step-by-step explanation:

Even though theres another way to solve this, I'll use graphing since we already have all the options for points

the point in blue is D, the fourth vertex. I graphed all other points and none of them made a parallelogram so student 2 is right.

Hope this helps!

What division problem gets you the answer of PI?

Answers

Circumference of a circle divided by diameter

Sam solved the following problem:-4x + 5 > 29
-4x + 5 - 5 > 29 - 5
-4x > -24
-4x/-4 > -24/-4
x > 6

What were his two mistakes?

Answers

Answer:

-4x > 24

x< 6

Step-by-step explanation:

-4x + 5 > 29

-4x + 5 - 5 > 29 - 5 (subtracted 5 on both sides)

To remove +5, Sam subtracted 5 on both sides. but 29-5 is 24

we always put the sign of greatest number . so its positive

-4x > 24 is correct

-4x/-4 > 24/-4

Dividing both sides by -4 is correct. But when we divide by negative number we need to flip the inequality sign . so > becomes <

x < 6

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