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Inessa [10]
3 years ago
13

2 3 us DO ON 7 45 US S

Mathematics
1 answer:
Virty [35]3 years ago
6 0

Answer:

9.8 sq. in.

Step-by-step explanation:

A = πr²

Diameter: 10 inches

Radius: 5 inches

A = π · 5²

A = π · 25

A = 78.54

Section 4 is about one eighth of the circle.

78.54 ÷ 8

9.8175

9.8175 ≈ 9.8

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to demonstrate probabilities, a mathematics teacher had students draw marbles from a bag which contained 6 yellow marbles and 10
Feliz [49]
4Okay, so here's how you will do the problem.

first lets find out how many marbles there are in total. At first, there are 16 marbles. (6 yellow + 10 blue)

knowing this
P(Yellow) = 6/16. that simplifies to 3/8
P(Blue) = 10/16. that simplifies to 5/8

We can tell these are correct because when added together the probabilities equal 1 (meaning there's no missing probabilities)

Now, 2 yellow marbles and 3 blue marbles are removed.

this means there are now 4 yellow marbles and 7 blue marbles. this brings the total amount of outcomes is 11.

Now
P(yellow) = 4/11
P(blue = 7/11

we can cross multiply or find out the decimal values and compare to find out if the two are equal

3/8.× 4/11
33........32

5/8 × 7/11
55....56

We will come back to what this shows us in a moment

yellow - .375 (3/8) > .36 repeated
blue - .625 (5/8) < .63 repeated

Both methods show that the probability CHANGED. So, YES the probabilities were affected.

in method one, the cross multiplying show that yellow probability goes down and blue probability goes up. Using the decimals shows the same

hope this helps!



8 0
3 years ago
Um vendedor ambulante chegou no final do dia e resolveu
Ivahew [28]
29292191992828338388191
6 0
3 years ago
a company has 2 photocopy machines. The probability that machine A will break down on a given day is 2%. The probability that ma
sleet_krkn [62]
Answer: 0.05%

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

Work Shown:

To go from percent form to decimal form, move the decimal over 2 spots to the left. Think of 2% as 2.0%
2% = 0.02
2.5% = 0.025

Multiply the decimal form of each percentage
0.02*0.025 = 0.0005

Convert that result to a percentage. Move the decimal 2 spots to the right
0.0005 = 0.05% is the probability both break down

Note: This multiplication rule only works if the two events are independent. 
4 0
3 years ago
99-7a^2 when a =3 please help!!!!!!!!!
Oxana [17]

Answer:

99-7a^2=36 when a =3

Step-by-step explanation:

99-7a²

99-7(3)²

99-7(9)

99-63

36

6 0
3 years ago
Michael is watching a movie that is 2 1/3 hours long. If he has already watched 1 2/9 hours of the movie, how much of the movie
MrMuchimi

Answer:

1.1

Step-by-step explanation:

6 0
3 years ago
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