Question

Maya plans to cover this model of a half moon completely with silver foil.



How many square centimeters of silver foil would Maya need to cover the model completely?

150.9

201.1

603.3

402.2

Answer 1

we have to see a picture..

Answer 2

Ummm I think we're missing so information here.

Answer 3

i've had this question before, you're missing the pic

Answer 4

ok hold on let me get it

Answer 5

hhmm hold on not working

Answer 6

ok i got it let me attach it guys

Answer 7

their it is

Answer 8

where did he go?

Answer 9

me?

Answer 10

no the jj guy

Answer 11

he was typing then he left oh and now he is back nvm

Answer 12

Surface Area: \[4\pi r ^{2}\]

Then, divide it by two since you only want half. AND NOW!You need the add the area of a circle because there is a circle on top

Area of circle: \[\pi r ^{2}\]

Answer 13

ok so 4times pie squared

Answer 14

Oh! Don';t add the circle at the end since it has to do a sort of U

Answer 15

no pi times 4 squared

Answer 16

I forgot it was a moon :3 so only do Surface Area of a Sphere.

Answer 17

ok

Answer 18

ok i got 50.26

Answer 19

doing pi times 4 squared

Answer 20

4πr^2...... divided by 2

Answer 21

DANG! Wait circle was there. I got too confussed. Let me just check this for a sec.

Answer 22

Ok yeah, so 4πr^2 divided by 2 with Area of circle.

Answer 23

just find the surface area of a sphere, divide that by 2
find the area of the circle and add that to the sphere

Answer 24

ok i forget how do you find area of circle im bad with math srry

Answer 25

Look up....

Answer 26

pr^2

Answer 27

p meaning pi...i always write p :/

Answer 28

ok

Answer 29

if any one can see this can you go over it with me step by step if that isnt much to ask for instead of little pointers im realy bad with math and need help ;_; :/

Answer 30

ok nvm i got after simple thinking

Answer 31

the awnser is 150.9

Answer 32

answer srry miss spell

Answer 33

you're correct

Answer 34

thanks alot guys jiji and you to ari

Answer 35

150.9 is right, i just did the math

Answer 36

did you put down the right answer?

Answer 37

yup XD

Answer 38

great :)

Answer 39

thanks alot i dont know why i made it so hard on myself guess i just over though t thr question

Answer 40

i remember getting this wrong on the test when i had it lol. i'm glad you got it right

Answer 41

yea hey i got a quick question

Answer 42

hm?

Answer 43

Robert is making a model of an hour glass, as shown below.



If both the cones are congruent, which statement is true?

The slant height of Cone 1 is equal to the diameter of Cone 2, and the radius of Cone 1 is equal to the height of Cone 2.

The lateral and total surface area of Cone 1 is equal to the lateral and total surface area of Cone 2.

The cones have different volumes.

They cones have different surface areas.

Answer 44

i believe its the second answer is that right

Answer 45

The lateral and total surface area of Cone 1 is equal to the lateral and total surface area of Cone 2.

because they're congruent

Answer 46

ok great so i was right thanks

Answer 47

no problem :)