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Anestetic [448]
3 years ago
11

A cube-shaped gift box has a volume of 8 cubic inches what is the side length of the box

Mathematics
1 answer:
Pani-rosa [81]3 years ago
7 0

Answer:

Each side is 2 inches long.

Step-by-step explanation:

Volume is Length x Width x Height

For a cube, all sides are the same so you need to figure out what number you can cube (multiply by it self 3 times) to get it to 8.

2 x 2 x 2 = 8

So, each side is 2 inches long.

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A human heart beats an average of 80 beats per minute.How many beats is this in an hour?express your answer in scientific notati
nlexa [21]

Answer:

4,800

Step-by-step explanation:

Sorry I don't know how to explain it scientifically but I know how to do the calculations

1) Theres 60 minutes in an hour

2) 80x60= 4,800 beats

4 0
3 years ago
Verify that cos squared A plus Sin squared A is equal to 1 if A is equal to 90 degrees
Scilla [17]

Answer:

see explanation

Step-by-step explanation:

To verify cos²A + sin²A = 1 with A = 90° , then

cos²90° + sin²90°

= (0)² + (1)²

= 0 + 1

= 1

3 0
2 years ago
Hellppppp me pleaseeeee
Alla [95]

Answer:240


Step-by-step explanation:

40 pencils in one minute

2 hours=120 minutes

40*120=480

480/2=240 boxes

3 0
3 years ago
Read 2 more answers
Suppose the heights of 18-year-old men are approximately normally distributed, with mean 65 inches and standard deviation 4 inch
Serhud [2]

Answer:

Step-by-step explanation:

<u>a)</u>

  • Given that ; X ~ N ( µ = 65 , σ = 4 )
  • P ( 64 < X < 66 )

From application of normal distribution ;

  • Z = ( X - µ ) / σ, Z = ( 64 - 65 ) / 4,  Z = -0.25
  • Z = ( 66 - 65 ) / 4,  Z = 0.25

Hence, P ( -0.25 < Z < 0.25 ) = P ( 64 < X < 66 ) = P ( Z < 0.25 ) - P ( Z < -0.25 ) P ( 64 < X < 66 ) = 0.5987 - 0.4013

  • P ( 64 < X < 66 ) = 0.1974

b) X ~ N ( µ = 65 , σ = 4 )

  • P ( 64 < X < 66 )

From normal distribution application ;

  • Z = ( X - µ ) / ( σ / √(n)), plugging in the values,
  • Z = ( 64 - 65 ) / ( 4 / √(12)) = Z = -0.866
  • Z = ( 66 - 65 ) / ( 4 / √(12)) = Z = 0.866

P ( -0.87 < Z < 0.87 )

  • P ( 64 < X < 66 ) = P ( Z < 0.87 ) - P ( Z < -0.87 )
  • P ( 64 < X < 66 ) = 0.8068 - 0.1932
  • P ( 64 < X < 66 ) = 0.6135

c) From the values gotten for (a) and (b), it is indicative that the probability in part (b) is much higher because the standard deviation is smaller for the x distribution.

4 0
3 years ago
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IceJOKER [234]

Answer:

12 or B is the answer

Step-by-step explanation:

4 0
3 years ago
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