3 years ago

Could someone give me a hand

Mathematics

1 answer:

Minchanka [31]3 years ago

4 0

The answer is thirty two

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The area of a circle is 81 ft 2 . What is the π circumference? Leave in terms of Pi.

KonstantinChe [14]

Answer:

10.2π

Step-by-step explanation:

Given data

Area of circle= 81 ft^2

Also, the expression for the area of a circle is

A=πr^2

substitute

81=3.142*r^2

r^2= 81/3.142

r^2= 25.77

square both sides

r= √25.77

r= 5.1

Also, the expression for the circumference is

C= 2πr

substitute

C= 2*π*5.1

C= 10.2π

Hence the circumference is 10.2π

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3 years ago

A coin is flipped. If a heads is flipped, then the coin is flipped 4 more times and the number of heads flipped is noted; otherw

MrRissso [65]

You worded this weird but wouldn't it be eight?

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3 years ago

I'm trying to figure this out, but I can't get it

Katen [24]

Answer:

$\sqrt{16 {r}^{6} } \\ ( \sqrt{16 {r}^{6} } )^{2} \\ (4 {r}^{3} )$

5 0

2 years ago

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X=?? solve for x hurry!

jarptica [38.1K]

Answer: x + 30 + 90= 180(sum of angles on a straight line)

x= 180-120

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7 0

3 years ago

What is the perimeter of parallelogram HIJK? Round to the nearest hundredth.

bixtya [17]

Answer:

Perimeter of the parallelogram = 26.64 units

Step-by-step explanation:

The perimeter of parallelogram = 2(a + b)

Here a = KJ = 7 units.

b = HK

We need to find the HK using the distance formula.

Distance formula = $\sqrt{(x2 - x1)^2 + (y2 - y1)^2}$

H = (-4, 3) and k = (-2, -3)

Now plug in x1 = -4, y1 =3, x2 = -2, y2 = -3 in the distance formula

HK = $\sqrt{(-2 -(-4))^2 + (-3 - 3)^2}$

= $\sqrt{(-2 +4)^2 + (-6)^2}$

= $\sqrt{4 + 36}$

= $\sqrt{40}$

HK = b = 6.32 units

Now plug in a = 7 and b = 6.32 in the perimeter formula, we get

Perimeter = 2(7 + 6.32)

= 2(13.32)

= 26.64 units

Thank you.

6 0

3 years ago