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KATRIN_1 [288]
4 years ago
9

The diameter of a circular swimming pool is 8.5 m. What is the approximate circumference of the pool? Round to the nearest tenth

. Use 3.14 for π
Mathematics
2 answers:
Anna007 [38]4 years ago
6 0
The circumference would be 26.7 M.
Nikolay [14]4 years ago
3 0

here,

d=8.5m

c=π×d

=3.14*8.5

=26.67

=26.7m

the circumference of the pool is 26.7 m.

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Adam and Martha each performed a simulation. Adam's simulation He tossed a fair coin 4 times. Each time the coin landed with tai
harina [27]

Answer:

Option D is correct.

B₁ = 4 and B₂ = 4

Step-by-step explanation:

The options of this question are attached.

Adam's simulation:

He tossed a fair coin 4 times and each time the coin landed with tails face up.

The probability that the coin lands with tail face up is

P(tails) = 1/2

Since there are two possible outcomes, heads or tails, so the chances of each outcome are 1/2.

It is given that Adam tossed the coin 4 times and each time got tails so the overall probability is

P(4 tails) = P(tails)*P(tails)*P(tails)*P(tails)

P(4 tails) = (1/2)*(1/2)*(1/2)*(1/2)

P(4 tails) = 1/16

Martha's simulation:

She randomly chose 1 block from each of two bags containing blocks. Each block she chose was labeled with the letter R.

So the probability is

P(2 R) = P(1 R)*P(1 R)

P(2 R) = (1/B₁)*(1/B₂)

Where B₁ and B₂ is the total number of blocks in each bag.

We are given that the probability for both Adam's and Martha's simulation were the same so,

1/16 = (1/B₁)*(1/B₂)

Refer to the attached options, only option D satisfies the above equation.

B₁ = 4 and B₂ = 4

1/16 = (1/4)*(1/4)

1/16 = 1/16   (satisfied)

None of the other option satisfies the above equation, Therefore, option D is correct.

4 0
4 years ago
Let sin A= -3/5 with 270°&lt; A&lt; 360°. Find the following.<br> sin A/2
GREYUIT [131]

Answer:

1/sqrt10

Step-by-step explanation:

1) Find out cosA using formula (cosA)^2+(sinA)^2=1

The module of cosA= sqrt (1- (-3/5)^2)= sqrt 16/25=4/5

So cosA=-4/5 or cosA=4/5.

Due to the condition 270degrees< A<360 degrees, 0<cosA<1 that's why cosA=4/5.

2) Find sinA/2 using a formula cosA= 1-2sinA/2*sinA/2 where cosA=4/5.

(sinA/2)^2= 0.1

sinA= sqrt 0.1= 1/ sqrt10 or sinA= - sqrt 0.1= -1/sqrt10

But 270°< A< 360°, then 270/2°<A/2<360/2°

135°<A/2<180°, so sinA/2 must be positive and the only correct answer is

sin A/2= 1/sqrt10

6 0
3 years ago
11) -6x – 9y = 0<br> -24x = 36y
arlik [135]

Answer:

x = 0, y = 0

or

(0, 0)

Step-by-step explanation:

-24x - 36y = 0

divide the equation by 4

-8x - 9y = 0

-6x - 9y = 0

multiply the second equation by -1

6x + 9y = 0

add them together

-8x - 9y = 0

6x + 9y = 0

-2x = 0

x = 0

substitute into the second equation

-8 * 0 - 9y = 0

-9y = 0

y = 0

5 0
3 years ago
Describe the solution set of the compound inequality x &lt; 2 and x &gt; 7
vlabodo [156]

Answer:

All values along the x-axis in the shaded regions.

Step-by-step explanation:

The solution set of the compound inequality is any number less than 2 and greater than 7. This means its all the numbers on the number line from 1.99999 to 0 to -9 to -1000 and so forth. And it's also any number greater than 7 including 7.01 to 1000 to 1,000,000. See the graph below to visually see the solution. The solution are all the numbers along the x-axis in the shaded regions.

7 0
4 years ago
Which of the following is the logical conclusion to the conditional statements below? a arrow b mb arrow c
IRINA_888 [86]

Answer:

B

Step-by-step explanation:

From what we have here;

if a implies b and b implies c

It simply means that we have a implying c

the correct representation here is given in the second option

And thus, we have it that;

a => c

5 0
3 years ago
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