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3 years ago

Okay so I'm struggling at this particular set of questions on Khan Academy. Anyone got any ideas?

Mathematics

2 answers:

Tanya [424]3 years ago

8 0

my best guess is 135 because if it can fit cubes with 1/4 inch sides, that means it can fit 9 cubes going lengthwise, and 3 cubes wide which is 27 cubes on the base. then it can fit 5 cubes, all 1/4 inch going up because in 1 1/4 inch there are 5 quarter inches. so if you multiply 27 by 5 you get 135. I hope that helps a little bit:)

Travka [436]3 years ago

6 0

I know this is not much help but I wrote all my work down and got 135 as well so I’m glad you got the correct answer. You will struggle sometimes, especially with challenging questions like that but remember it will always get easier as you go alone((: good luck to you!

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What is the height of cone S?

balu736 [363]

Answer:

12 cm

Step-by-step explanation:

First, we find the scale factor from cone S to cone T.

ratio of volumes = (vol of T)/(vol of S) = (6144 pi cm^3)/(768 pi cm^3) = 8

The ratio of the volumes is 8:1

The scale factor, which is the ratio of linear dimensions (height, radius, etc.), is the cubic root of the ratio of the volumes.

scale factor = cubic root of 8 = 2

The height of cube T is 24 cm, so the height of cube S is 24 cm/2 = 12 cm.

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3 years ago

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A restaurantis planning to make changes to its menu. In order to decide which potential menu items are most popular with the cit

Alex

Answer:

Simple random sampling survey method

Step-by-step explanation:

A simple random sampling is an unbiased survey technique Hence it will represent all the parts of the city's population.

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3 years ago

14+4k=2−2k solve for k

n200080 [17]

14+4k=2-2k
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3 years ago

8(x - 1) - 4 = 4(2x - 3)

nordsb [41]

Answer:

All real numbers.

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2 years ago

Let A {x ∈ N : 3 ≤ x ≤ 13}, B {x ∈ N : x is even}, and C {x ∈ N : x is odd}.

murzikaleks [220]

Answer: The answer is as follows:

Step-by-step explanation:

From the given information, we have

Let A {x ∈ N : 3 ≤ x ≤ 13}, B {x ∈ N : x is even}, and C {x ∈ N : x is odd}

A = {3,4,5,6,7,8,9,10,11,12,13}

B = {2,4,6,8,10,12,14,..........,....}

C = {1,3,5,7,9,11,13,15,17,...........,}

(a) A∩B = {4,6,8,10,12}

(b) A∪B = {3,5,7,9,11,13 and x ∈ N : x is even}

(d) B∪C = { x ∈ N : x is even and x ∈ N : x is odd}

Example of sets A and B when A ∩ B = {3, 5} and A ∪ B = {2, 3, 5, 7, 8}

A = {2,3,5,7,8} and B = {3,5}

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2 years ago