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NISA [10]
4 years ago
8

There are five students standing in a line with their hats. Suddenly the wind picks up the hats and randomly assigns each hat to

a student. What is the probability that no student will get his or her own hat
Mathematics
1 answer:
laiz [17]4 years ago
5 0

Answer:

The probability of a person getting their own hat is 1/5 or 20%.

Step-by-step explanation:

If each person has one hat the chances (the probability) of them getting their own hat would be 20%. The chances (the probability) of them getting a hat that belongs to one of the other four students would be 80%. Due to there being 5 hats each person owns 1 hat so there would be a 1 out of 5 chance of them getting their own hat.

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3 years ago
The top of a 230 foot vertical tower is to be anchored by cables that make an angle with a measure of 50 degrees with the ground
Triss [41]

9514 1404 393

Answer:

  • cable length: 300.2 ft
  • anchor distance: 193.0 ft

Step-by-step explanation:

The side given is opposite the given angle. We want to find both the hypotenuse and the adjacent side in the right triangle that models the geometry.

  Sin = Opposite/Hypotenuse

  sin(50°) = (230 ft)/h

  h = (230 ft)/sin(50°) ≈ 300.24 ft

The length of the cable must be about 300.2 feet.

__

  Tan = Opposite/Adjacent

  tan(50°) = (230 ft)/d

  d = (230 ft)/tan(50°) ≈ 192.99 ft

The cable must be anchored about 193.0 ft from the tower.

4 0
3 years ago
You have a fancy 2nd-floor room and need a new mattress. You need to bring your mattress in through the french doors on your bal
Harrizon [31]

Here is your answer

\bold{107.62} inches

Since the door will be in shape of a rectangle where,

length= 80 inches

breadth= 72 inches

So,

widht of largest mattress that can fit diagonally is diagonal of the door.

i.e.

d= \sqrt{{l}^{2}+{b}^{2}}

d= \sqrt{{80}^{2}+{72}^{2}}

d= \sqrt{6400+5184}

d= \sqrt{11584}

d= 107.62

HOPE IT IS USEFUL

4 0
3 years ago
Carly made $10 in interest by placing $500 in a savings account with simple interest for 1 year. What was the interest rate?
yan [13]

Answer:

2% or 0.02

Step-by-step explanation:

I=prt

10=500*x*1

10=500x

divide 500 by both sides

rate=0.02 or 2%

7 0
3 years ago
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