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Andrews [41]
2 years ago
9

Please help. I’ll mark you as brainliest if correct

Mathematics
1 answer:
ryzh [129]2 years ago
5 0

Answer:

527, no mistakes this time

Step-by-step explanation:

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A lottery game has balls numbered 1 through 21. What is the probability of selecting an even numbered ball or an 8? Round to nea
Viktor [21]

Answer: 0.476

Step-by-step explanation:

Let A = Event of choosing an even number ball.

B = Event of choosing an 8 .

Given, A lottery game has balls numbered 1 through 21.

Sample space: S= {1,2,3,4,5,6,7,8,...., 21}

n(S) = 21

Then, A= {2,4,6,8, 10,...(20)}

i.e. n(A)= 10

B= {8}

n(B) = 1

A∪B = {2,4,6,8, 10,...(20)} = A

n(A∪B)=10

Now, the probability of selecting an even numbered ball or an 8 is

P(A\cup B)=\dfrac{n(A\cup B)}{n(S)}

=\dfrac{10}{21}\approx0.476

Hence, the required probability =0.476

7 0
3 years ago
The speed of light is about 3x10 to the 8th power meters per second. About how far can light travel in 30 minutes?
ella [17]
5.4x10^11 metres per second or 540,000,000,000 metres per second
7 0
3 years ago
A right triangle has side lengths 4 units, 5 units, and x units what is the difference between the difference values of x?
irina [24]

Use the Pythagorean theorem.

If x is a hypotenuse, then we have:

x^2=4^2+5^2\\\\x^2=16+25\\\\x^2=41\to x=\sqrt{41}

If x is a leg, then we have:

x^2+4^2=5^2\\\\x^2+16=25\ \ \ \ |-16\\\\x^2=9\to x=\sqrt9\to x=3

Answer: \sqrt{41}-3

6 0
3 years ago
Katha walks 5 blocks east. Then she walks straight back to where she started and walks 5 blocks west.
anyanavicka [17]

Answer:

5 is the point on the number line how far she walked east

0 is the point on the number line where she began walking

-5 is the point on the number line how far she walked west

Step-by-step explanation:

5 0
3 years ago
− +  +   7 3 4 18 2 5
zimovet [89]

Answer:

49 + 9 \times 4 + 18 \div 10 \\ 49 + 36 + 1.8 \\ 85 + 1.8 \\ 86.8

3 0
2 years ago
Read 2 more answers
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