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Blizzard [7]
3 years ago
15

A 4cm cube is cut into 1 CM cubes. what is the percentage increase in the surface area after such cutting? ​

Mathematics
1 answer:
Contact [7]3 years ago
6 0

Answer:

400%.

Step-by-step explanation:

The surface area of a 4 cm cube = 6 * 4^2

= 96 cm^2.

The number of 1 cm cubes that can be cut from the larger cube is :

16 * 4 = 64.

The surface area of each of these smaller cubes is 6*1 = 6 cm^2.

The increase in surface area  is a factor of  (6*64) / 96

= 4 = 400%.

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salantis [7]

The value of test statistic is 5.45

Data;

  • n1 = 25
  • n2 = 30
  • x1 = 6.2
  • x2 = 3.8
  • s1 = 2
  • s2 = 1

<h3>Test Statistic</h3>

The formula to calculate the test statistic is given as

t = \frac{x_1 - x_2}{\sqrt{\frac{s_1^2}{n_1}+ \frac{s_2^2}{n_2}  } } \\

Let's substitute the values and solve for t

t = \frac{x_1 - x_2}{\sqrt{\frac{s_1^2}{n_1}+ \frac{s_2^2}{n_2}  } } \\t = \frac{6.2 - 3.8}{\sqrt{\frac{2^2}{25} + \frac{1^2}{30}  } } \\t = \frac{2.4}{0.44} = 5.45

The value of test statistic is 5.45

Learn more on test statistic here;

brainly.com/question/15980493

5 0
3 years ago
Let f(x) = 5x2 – 4x and g(x) = 5x + 1.
Nastasia [14]

f(x) = 5x^2 - 4x

g(x) = 5x + 1

Therefore f - g = 5x^2 - 4x - (5x + 1)

= 5x^2 - 4x - 5x -1

= 5x^2 -9x - 1


Hope it helps :)











8 0
3 years ago
Read 2 more answers
F(x)=3x-7 input is 3
Triss [41]

Answer:

The answer is f(x)=2

Step-by-step explanation:

When the input is given it means that the x is substituted by that number.

so 3x3-7.

3x3-7

9-7=2.

The f of x is equivalent to 2.

I hope this helps :D

5 0
3 years ago
Three consecutive even integers add up to -6 what are they?
DanielleElmas [232]

Answer:

I think this is the answer

7 0
3 years ago
Find the volume of a cube where the length of each side is 4 centimeters.
skad [1K]

4 x 4 x 4 = 64

as volume = length x width x height

8 0
4 years ago
Read 2 more answers
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