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kow [346]
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?
Mathematics
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

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The area of a circular plate is 625pi sqaure in. If the radius of the plate is tripled what is the new area
goldenfox [79]

Answer:

5625in²

Step-by-step explanation:

Area of the plate = πr²

625π = πr²

625 = r²

r = √625

r = 25in

If the radius of the plate is tripled, then the new radius will be 3(25) = 75in

New Area = π(75)²

New Area = 5625π in²

If the radius is tripled, the new area of the plate is 5625in²

5 0
3 years ago
The tape diagram represents an equation.
Orlov [11]

Answer:

t = 4

Step-by-step explanation:

13 + t = 17

t = 4

13 + 4 = 17

An easier way to solve a question like this is to subtract the number given by the answer.

Example:

17 - 13 = 4

4 0
3 years ago
Solve the equation. Show all work.<br> -2 (4 - x) = 12x – 3<br> (I think this is 9th grade algebra)
Genrish500 [490]

Answer:

-1/2

Step-by-step explanation:

-2 (4 - x) = 12x – 3

-8+2x=12x-3

+8            +8

2x=12x+5

-12x  -12x

-10x=5

/-10  /-10

= -1/2

4 0
3 years ago
Read 2 more answers
PLEASE HELP !!!!!!!!!!!!!!!!!!!!!!!I will give brainliest !!!!!!!!!!!!!!Sam knows he will be waiting at least 80 minuets in line
sergiy2304 [10]

Answer:

4

Step-by-step explanation:

20 x 4 = 80

so 1 per 20 minuets,and 4, 20 min. magazines would mean he needs 4 to make it to 80

6 0
3 years ago
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2 4/5 divided by 2/3
daser333 [38]

Answer:

4.2 cuz yeah

Yeet :)

5 0
3 years ago
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