Question

Please help!! Part A: Two similar prisms have heights of 4cm and 10cm. What is the ratio of their surface areas?
A. 2:5
B. 4:25
C. 8:125
D. 16:625

Answer 1

A

Answer 2

Could you explain please?

Answer 3

Because their heights have the ratio 2:5 and the prisms are similar. That's why their surface have the same ratio - 2:5.

Answer 4

Could I ask you another one like it?

Answer 5

Go on

Answer 6

What is the ratio of the volumes of the prisms in the previous problem?

Would it be the same answer?

Answer 7

The answer choices are the same also

Answer 8

My book says that the ratio for volumes is a^3:b^3 and the ratio for areas is a^2:b^2. Sorry idk if that helps...

Answer 9

Oh, I'd made mistake.. I didn't mention that prisms are stereometrical. Ok.. Step by step. Prism have square surface area, right? And each side of SurfArea of one prism have the ratio with the same side of the other prism 2:5. So, surface areas have ratio 4:25. Now their volumes must have ratio 8:125, because each of three multipliers in volume_formula have the ratio 2:5.
Sorry, for first mistake)

Answer 10

That's okay. The second one is 8:125 right?

Answer 11

Yes

Answer 12

I'll give you a medal if you help with some more??

Answer 13

Let's try)

Answer 14

Which of the following could represent the scale factor of the larger cylinder to the smaller cylinder? Large ones diameter = 18, height = 30. Smaller ones diameter = 12, height = 20.

Answer 15

Answer choices(pick two)
A. 15:9
B. 5:3
C. 3:2
D. 21:14
E. 2:3
F. 20:30

Answer 16

Well... If I'm understanding correctly, if we multiply larger cylinder by scale factor then we must receive small cylinder, right? Sizes of smaller cylinder have the ratio with sizes of larger one 2:3. So, we must take scale factor 2:3 or 20:30 in order to make correct calculation.

Answer 17

So it's 2:3 and 20:30?

Answer 18

Yes

Answer 19

A cylinder with a 4 in. Diameter and a 6 inch height holds 1 pound of oatmeal. To the nearest ounce, how much oatmeal will a similar 10 inch tall cylinder hold? (Hint: 1 pound = 16 ounces)

Answer 20

I will answer later. I must run)

Answer 21

Answer choices:
A. 37
B. 44
C. 74
D. 192

I'm guessing it's 37 but not sure

Answer 22

Could I talk to you tonight at like 8:30?

Answer 23

hello

Answer 24

Now it is 22:36 in the city, where I am. If we have similar time or you have earlier time - it will be Ok. Otherwise, I can't guarantee that I will answer)

Answer 25

I've got 74. If cylinders are similar then their sizes have ratio 3:5 (height1/height2=6/10=3/5). That's why their volumes have ratio (3/5)^3. So, vol1/vol2 = 27/125, and vol2 = 125/27*1pound*16ounces.

Answer 26

Pease close this post and post math questions in the math section.