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Katen [24]
3 years ago
5

A person has forgotten the last digit of a telephone number, so he dials the number with the last digit randomly chosen. How man

y times does he have to dial (not counting repetitions) in order that the probability of dialing the correct number is more than 0.5.
Mathematics
1 answer:
aleksklad [387]3 years ago
4 0

Answer:

More than 5 times

Step-by-step explanation:

There are 10 options for the last digit (0, 1, 2.....9)

Probof 0.5 means 50% chance of getting it right,

Which would happen when he has tried 50% of the total possibilities, which are 10

50% of 10 = 5

He'll have to dial 5 times for a probability of 0.5.

More than 5 times for a probability of more than 0.5

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How do you find the surface area for this???
Katarina [22]
The surface area of any object is the sum of the areas of all the faces. In this case, we have a rectangular prism with dimensions 8x4x3 and a trianglar prism with a 8x4 rectangular base and height of 6.

Let's start with the rectangular prism. We have the bottom which is 8x4, two sides that are 3x4, and two sides that are 8x3.

8*4 + 2*3*4 + 2*8*3 = 104 in^2

Now that's find the surface area of the trianglar prism. We have the rectangular side on top which is 10x4, the rectangular side on the right which is 6x4, and two triangles that are 8 long and 6 high.

10*4 + 6*4 + 2*0.5*8*6 = 112 in^2

The total surface area is 104 + 112 = 216 in^2





8 0
3 years ago
-10x—16=14<br> -16x -6 = 14
Alla [95]

Answer: No solution

Step-by-step explanation:

-10x-16=14

-16x-6=14

-10x-16=-16x-6

-10x+16x-16=-16x+16x-6

6x-16=-6

6x-16+16=-6+16

6x=10

x=10/6

x=5/3

-16(5/3)-6=

-80/3-6*3/3=

-80/3-18/3=

(-80-18)/3=-98/3 \neq 14

Hence, there is no solution

4 0
1 year ago
The length of the red line segment is 8, and the length of the blue line segment is 4. How long is the major axis of the ellipse
inessss [21]

Answer: the answer is

C. 12

5 0
3 years ago
What is the measure of each interior angle in a regular 30-gon?
Rasek [7]
Exterior angles always add up to 360 degrees so for 30-gon each exterior angles is 12 degrees (360/30)

To get the interior angles you subtract 180 from 12 to get 168 degrees
5 0
3 years ago
Then p=3.<br> Use the equation k = 3n to find the value of k when n = 3.
Bad White [126]

Answer:

k = 9

Step-by-step explanation:

n = 3, so substitute 3 for n in the equation

k = 3(3)

k = 9

6 0
3 years ago
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