Question

HELP!!! The surface area of two similar rectangular prisms are 361m2 and 441m2. What is the scale factor of the larger prism to the smaller prism?
A.) 361/441
B.) 19/21
C.) 21/19
D.) 19/11

Answer 1

@ganeshie8 please help

Answer 2

@Nnesha

Answer 3

@nincompoop

Answer 4

Hint : If areas of similar figures are in ratio \(\dfrac{a}{b}\), then the lengths(scale factors) will be in ratio \(\dfrac{\sqrt{a}}{\sqrt{b}}\)

Answer 5

so i just take each answer choice and do that to them??

Answer 6

i'm still not understanding

Answer 7

Yes, first setup the ratio of areas

Answer 8

is it 19/21

Answer 9

careful, they want larger prism on top

Answer 10

ratio of areas = \(\dfrac{441}{361}\)

Answer 11

so its C?

Answer 12

so, ratio of scalefactors = \(\dfrac{\sqrt{441}}{\sqrt{361}}=?\)

Answer 13

21/19

Answer 14

Yep!

Answer 15

i have another question if thats ok

Answer 16

sure ask

Answer 17

The two cones are similar. Find the surface area of the larger cone. Round your answer to the nearest hundredth.
A. 810.28
B. 847.80
C. 868.30
D. 886.25

Answer 18

@ganeshie8

Answer 19

S=π×11.12+π×11.1×13.8 is the formula, solve that and u will get the answer

Answer 20

I got 516..../

Answer 21

that's not right

Answer 22

hmm let me solve and see what i get

Answer 23

ok

Answer 24

i am sorry the same question is on open study and I checked the formula I am so sorry I was not able to help

Answer 25

i feel bad :(

Answer 26

its ok. @ganeshie8 can you help

Answer 27

thnx