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Mashutka [201]
3 years ago
10

A bag contains balls numbered 1 to 20 if one is chosen at random what is the probability that it is prime

Mathematics
1 answer:
sergey [27]3 years ago
3 0

Answer: 8/20 or 40%.

Step-by-step explanation: The prime numbers between 1 and 20 are 2, 3, 5, 7, 11, 13, 17, and 19. 8 in total, so 8/20. Divide 8 by 20 and you get 0.4 which transfers to 40%.

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A cross-shaped pattern is made by arranging four identical rectangles around the side of a square, as shown in the diagram.
const2013 [10]

Answer:

88 cm

Step-by-step explanation:

The side of the square = 6 cm, so the shorter side of each rectangle = 6 cms.

The area of each rectangle =  36 *  1 1/3

= 36 * 4/3 = 48 cm^2

So the longer side of each rectangle = 48 / 6 =  8 cms

Therefore, the perimeter of the whole figure

=  4( shorter sides ) + 8(longer sides)

= 4*6 + 8*8

= 24 + 64

= 88 cm   (answer)


7 0
3 years ago
Why does 498 * 8.32 equal 4 1/4 3.36
Svetradugi [14.3K]

Answer:

The answer is 4143. 36 but I don't know why there are fractions

Step-by-step explanation:


6 0
2 years ago
Read 2 more answers
Question 20
Andrej [43]

The distance between the bottom of the lighthouse and the boat is 77.6m.

<h3>What is the distance between the bottom of the lighthouse and the boat?</h3>

The lighthouse and the boat would form a right triangle. The height would be the height of the lighthouse. The  distance between the top of the lighthouse and boat would be the hypotenuse. The  distance between the bottom of the lighthouse and the boat would be the base.

In order to determine the required distance, Pythagoras theorem would be used.

The Pythagoras theorem: a² + b² = c²

  • where:
    a = length
  • b = base
  • c = hypotenuse

125²  = 98²  + b²

b² = 125²  - 98²

b = √(25²  - 98² )

b = 77.6m

To learn more about Pythagoras theorem, please check: brainly.com/question/14580675

#SPJ1

3 0
1 year ago
This factored? I know it’s easy but I’m exhausted
goldenfox [79]

Yes, the is factor since there is nothing to factor out from that

7 0
3 years ago
21=8+x (solve for x)
gavmur [86]

Answer:

X=13

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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