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rjkz [21]
3 years ago
11

14 Points! Please help me answer ALL questions. I really need help!

Mathematics
1 answer:
nika2105 [10]3 years ago
7 0
1-A. About fifty people because the odds are 1/2 and half of 100 is fifty.

B. They would raise 3,000 cents if 100 people played the game because of half didn't win you would have 2,500 cents from what they paid and if half did win you would have 500 cents from having to pay for the prizes leaving only 10 cent from each person who won.

C. I do not think it is an effective game for raising money at a school party because even though the chance is 50:50 it does necessarily mean that half of the people will win and half will lose. Also if not a lot of people come to play your game it won't raise as much money.

2-A. If you flipped a coin 75 times you would expect to get heads 37 to 38 times. Because that is around half.

B. If you flipped a coin 75 you would expect to get heads 37 to 38 times because that is also around half.

C. No, you cannot conclude that the coin is not a fair coin. You have a fifty:fifty chance of getting it heads or tails. Just because the coin landed on heads more that tails does not necessarily make it unfair because every time you flip it it still has that fifty: fifty chance.



I hope this helps.
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A three inch diameter pulley on an electric motor that runs at 1800
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Answer:

a) 3 inch pulley: 11,309.7 radians/min

6) 6 inch pulley: 5654.7 radians/min

b) 900 RPM (revolutions per minute)

Step-by-step explanation:

Hi!

When a pulley wirh radius R rotantes an angle θ, the arc length travelled by a point on its rim is Rθ.  Then the tangential speed V is related to angular speed  ω as:

V=R\omega

When you connect two pulleys with a belt, if the belt doesn't slip, each point of the belt has the same speed as each point in the rim of both pulleys: Then, both pulleys have the same tangential speed:

\omega_1 R_1 = \omega_2 R_2\\

\omega_2 = \omega_1 \frac{R_1}{R_2} =1800RPM* \frac{3}{6}= 900RPM

We need to convert RPM to radias per minute. One revolution is 2π radians, then:

\omega_1 = 1800*2\pi \frac{radians}{min} = 11,309.7\frac{radians}{min}

\omega_2 = 5654.7 \frac{radians}{min}

The saw rotates with the same angular speed as the 6 inch pulley: 900RPM

3 0
4 years ago
Solve for x in the triangle. Round your answer to the nearest tenth.
ICE Princess25 [194]

Answer: x ~34.31 (rounded)

5 0
4 years ago
LEAST COMMON MULTIPLE OF 27 , 48, 66
MrRissso [65]
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3 years ago
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The coordinates of the endpoints of the diameter of a circle are (-1,5) and (3, -1). The center of the circle has coordinates
Setler79 [48]

Answer:

ans=(-2,2)

Step-by-step explanation:

let the end point of circle diameter (-1,5) and (3,-1) be (x1,y1) and (x2,y2) respectively

using mid point formula

(x,y)=(-1,5)/2+(-3,-1)/2  [center point is equal to mid point of  diameter)

       =  (-1+(-3))/2+(5-1)/2

       =(-2,2)

center coordinate of circle=(-2,2)

3 0
3 years ago
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Samuel consumed 2129 calories of food on Monday, 2348 calories on Tuesday, and 1863
ZanzabumX [31]

Answer:  2460 calories

Step-by-step explanation:

2129 + 2348 + 1863 = 6340

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8800 - 6340 = 2460

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