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const2013 [10]
2 years ago
14

A coin is tossed 5 times. Find the probability that none are heads. Find the probability that at most 2 are heads.

Mathematics
1 answer:
kiruha [24]2 years ago
6 0
1- the answer is 1/32


each time we flip a coin the whole probabilities are 2
if we flip it 5 times
2*2*2*2*2=32

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I am a number less than 100. I am a product of two prime numbers. If you reversemy digits, I am a prime. The sum of my digits is
almond37 [142]

Answer:

You are number 34

Step-by-step explanation:

* Lets explain how to solve the problem

- The number is less than 100

∴ The number is 2-digit  number

- The number is the product of 2 prime numbers

∴ The two prime numbers could be two of these numbers:

   2 , 3 , 5 , 7 , 11 , 13 , 17 , 19 , 23 , 29 , 31 , 37 , 41 , 43

∵ The number is less than 100

∴ The two prime numbers are 1-digit numbers OR one of them

   is 1-digit and the other is 2-digit

- The sum of its digits is a 1-digit

∴ The sum of its digits is less than 10

- One of its digit is a square number

∴ One of its digit is 1 or 4 or 9 because they are square numbers

* Look to the prime number above the number and chose two of

  them try to find the answer

- Start with the product of 1-digit prime numbers

∵ 2 and 7 are prime numbers

∵ 2 × 7 = 14 and the sum of its digits is less than 10 (1 + 4 = 5)

∵ 14 < 100

∵ The reversed of its digits obtained 41 which is a prime number

∵ 4  and 1 are a square number (1² = 1 or 2² = 4)

∴ The number is not 14

- Chose one of them 1-digit and the other 2-digit

∵ 2 and 17 are prime numbers

∵ 2 × 17 = 34 and the sum of its digits is less than 10 (3 + 4 = 7)

∵ 34 < 100

∵ The reversed of its digits obtained 43 which is a prime number

∵ 4 is a square number (2² = 4)

∴ The number is 34

* You are number 34

4 0
3 years ago
Answer correctly please !!!! Will mark Brianliest !!!!!!!!!!!!!!
Butoxors [25]

Answer:

100π

Step-by-step explanation:

Area of a circle formula: πr²

The radius would be half of 20 m

So the radius, r is 10 m

Plug that in

πr²=π·10²=100π

7 0
2 years ago
Read 2 more answers
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fiasKO [112]

Answer:

1.5 is the slope of the graph.

Step-by-step explanation:

slope of the graph :-

=》

\frac{y2 - y1}{x2 - x1}

=》

\frac{50 - 20}{20 - 0}

( by taking coordinates, (20,50) and (0,20) )

=》

\frac{30}{20}

=》

\frac{3}{2}

=》

1.5

3 0
2 years ago
Is 0 a real, imaginary, or complex number?
Sonja [21]

Answer: 0 is a imaginary number

Step-by-step explanation:

7 0
3 years ago
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FrozenT [24]

Answer:

sin (20) = - 2\sqrt{10}/ 7

Step-by-step explanation:

1- Find the trigonometric values

Hope this helps :)

7 0
2 years ago
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