Ask question

Ask question

All categories

3 years ago

7

A 3x4x5 rectangular cuboid (e.g. a brick) is painted blue and cut into 1x1 cubes. what is the expected value for the painted sid

es of a randomly selected cube?

1 answer:

Anton [14]3 years ago

4 0

Answer:

8 cubes are painted on 3 sides

24 cubes are painted on 2 sides

22 cubes are painted on 1 sides

6 cubes are painted on 0 side

E = 3 * 8/60 + 2 * 24/60 + 1 * 22/60 + 0 * 6/60 = 47/30 = 1.567

You might be interested in

What is the factorization of the trinomial below? 4x2 + 20x - 24

Ivenika [448]

Hey there!

$4x^{2} +20x -24$
We can first factor out the 4 (bring it outside the parenthesis)

$4( x^{2} +5x - 6)$
Now have a closer look between the parenthesis, because this expression can be factored as well. We're looking for two different numbers with a product of -6 and a sum of 5. Hence, we find the numbers 6 and -1

$4(x-1)(x+6)$
~ Hope this helps you!

6 0

3 years ago

If the formula for finding the area of a rectangle is A=bh, then how could you describe the formula for finding the area of a tr

vladimir1956 [14]

Answer:

A=LxW

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

(−5)∙(a−2b+3c−4d)−(−3)∙(4a−3b+2c−d)<br> Simplify

NeX [460]

Https://www.symbolab.com/solver/algebra-calculator/%5Cleft(-5%5Cright)%5Ccdot%5Cleft(a-2b%2B3c-4d%5C...

3 0

4 years ago

While playing games on a particular smart phone, 1% of the battery is drained every five minutes of game play. The battery start

Nostrana [21]

Answer:

B(75) represents the percent of battery full after 75 minutes of game play

Step-by-step explanation:

Let m represent the number of minutes of game play. If 1% of the battery is drained every five minutes of game play, then after m minutes of game play $\dfrac{m}{5}\%$ was drained.

The battery starts off at 80% full. After m minutes the battery will have

$B(m)=80-\dfrac{m}{5}$

percent full.

When $m=75$ minutes, then

$B(75)=80-\dfrac{75}{5}=80-15=65\%.$

8 0

3 years ago

Solve for X please help

QveST [7]

Answer:

<em>-</em><em>1</em>

Step-by-step explanation:

<em>x</em><em> </em><em>is</em><em> </em><em>an</em><em> </em><em>unknown</em><em> </em><em>and</em><em> </em><em>can</em><em> </em><em>be</em><em> </em><em>known</em><em> </em><em>as</em><em> </em><em><u>1</u></em><em><u> </u></em><em>or</em><em> </em><em><u>-</u></em><em><u>1</u></em><em><u> </u></em><em>based</em><em> </em><em>on</em><em> </em><em>the</em><em> </em><em>circumstance</em><em>.</em><em> </em>

<em>Therefore</em><em>,</em><em> </em><em>in</em><em> </em><em>this</em><em> </em><em>case</em><em>,</em><em> </em><em>x</em><em> </em><em>is</em><em> </em><em>known</em><em> </em><em>as</em><em> </em><em><u>-</u></em><em><u>1</u></em>

3 0

3 years ago