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sergey [27]
3 years ago
5

a shelf holds 3 novels, 2 biographies, and 1 history book. two students in turn choose a book at radom. what is the probability

that the students choose both biographies?
Mathematics
1 answer:
shepuryov [24]3 years ago
3 0
1/2 choose biographies
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Find the measure of the central angle of a sector if its area is 5 pi and the radius is 6
lesantik [10]
For this case we use the following formula
 Area of Sector = Area * radians of sector / 2 * pi radians
 Where,
 Area: it is the area of the complete circle.
 We have then:
 Area = pi * r ^ 2
 Area = pi * (6) ^ 2
 Area = 36pi
 Substituting values:
 5pi = 36pi * radians of sector / 2 * pi
 Clearing:
 radians of sector = ((5pi) * (2pi)) / (36pi)
 radians of sector = (10pi ^ 2) / (36pi)
 radians of sector = (10pi) / (36)
 radians of sector = (10/36) pi
 radians of sector = (5/18) pi
 in degrees:
 (5/18) pi * (180 / pi) = 50 degrees
 Answer:
 The measure of the central angle is:
 50 degrees
3 0
3 years ago
If the ball is not caught, how long will it be in the air?
ale4655 [162]

Wow this is a good question whatttt

5 0
3 years ago
How long would it take charlie to run 5 laps
alexandr402 [8]
2:10 and 4:20
therfor
1:5
times 5
5:25
answer is 25 minutes
3 0
3 years ago
HELP PLEASE I NEED HELp
lidiya [134]

Answer:

Step-by-step explanation:

GH bisects ∠FGI

∠HGI = ∠HGF

4x - 14 = 3x - 3

4x = 3x - 3 + 14    {Add 14 to both sides}

4x = 3x + 11             {Subtract 3x from both sides}

4x - 3x = 11

x = 11

∠HGI = 4x - 14

         = 4*11 - 14

         = 44 - 14

         = 30°

∠FGI = 30 + 30

        = 60°

4 0
2 years ago
Three minutes after a skydiver opens his parachute, he has descended 2,850 feet. After 5 minutes, he has descended 4,750 feet. I
SVEN [57.7K]
3 minutes = 2850
5 minutes = 4750

In 8 minutes he descended = 7600

1 min = 7600/8 = 950ft per min

Hope i become the brainliest answer.
6 0
3 years ago
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