Question

A circle has a circumference of 14 ft. Its area is halved. Describe the effect on the circumference of the circle.

The circumference is divided by √2.

The circumference is divided by 2.

The circumference doubles.

The circumference is divided by √3.

Answer 1

PLEASE I NEED HELP!!!!!!

Answer 2

Find the surface area of a sphere with a diameter of 76 cm.

3850 π cm2

1925 π cm2

5776 π cm2

7701 π cm2

Answer 3

Area Proportion: a^2:b^2
Linea Measure Proportion: a:b

Halving the area gives these proportions:

a^2:(1/2)b^2

Moving to Linear Measure

\(a:\dfrac{b}{\sqrt{2}}\)

Answer 4

I posted the new question that I need help with :) @tkhunny

Answer 5

@Squirrels

Answer 6

You're not getting the idea posting new question on new threads.

Diameter = 2* Radius

Volume = \(\dfrac{4}{3}\pi r^{3}\)

Surface Area = \(4\pi r^{2}\)

Answer 7

so how do i solve for the answers?

Answer 8

Find the surface area of a sphere with a diameter of 76 cm.

3850 π cm2

1925 π cm2

5776 π cm2

7701 π cm2

Answer 9

those are the options

Answer 10

@tkhunny

Answer 11

I hate to say this but i am in a awful hurry, my class ends in 2 hours

Answer 12

@thomaster

Answer 13

@superhelp101

Answer 14

@Squirrels

Answer 15

Just use the surface area formula
\[4\pi r^2\]

Answer 16

Thats the surface area formula for the "sphere".

Answer 17

how do i do that? im seriously bad at math! :(

Answer 18

Thats fine, ill teach you how to do it but I'm not giving you the answer just like that :p

Answer 19

I do really appreciate the help, im just in a hurry cause my class ends in 2 hours and i need to pass my class! :'(

Answer 20

Ok so it says to find the surface area of a "sphere"
This is the S.A. of a sphere
\[4\pi r^2\]
\[\pi=3.14\]
r=radius

and the 2 \[?^2\] is an exponent. Which means you multiply that number by the number by "2".

Answer 21

I don't really follow your logic. If you are "seriously bad at math", why do you think you should pass? I do not believe you are seriously bad at math. Based on your urgency, maybe you just let it sit around too long? You can't learn it in five minutes. It sometimes take time, particularly when you are SURE you can't do it. Stop trying to get someone else to do your homework or take your exam. You either know it or you don't if there remains only two hours. Time to pay the piper, perhaps.

Answer 22

that just an example leah, im just showing you what an exponent is. that little 2.

for example,

\[4^2=4\times4\]

Answer 23

I know where you are coming from but i have faced hardships that caused me to get behind and since i was little i have not really been able to comprehend math

Answer 24

Anyways the diameter is 76 cm

and the radius=half of the diameter

can you tell me the radius?

Answer 25

38

Answer 26

good now lets go back to the surface area formula of a sphere.

\[4\pi r^2\]
now we can plug in the radius.
\[4\pi 38^2\]

Do you know what to do now?

Answer 27

i got 1444

Answer 28

ok good now it looks like this
\[4\pi1444\]
Now what?

Answer 29

im not too sure what goes next to be honest

Answer 30

Ok thats fine. What we do next is multiply.
\[\pi=3.14\]
\[4\times3.14\times1444\]

Answer 31

Im sure what you know what to do next :p

Answer 32

181364.64

Answer 33

is that correct?

Answer 34

Yup thats correct! (: good job. medal for you

Answer 35

but its not an option for the answers

Answer 36

Find the surface area of a sphere with a diameter of 76 cm.

3850 π cm2

1925 π cm2

5776 π cm2

7701 π cm2
these are the options

Answer 37

OHHH thats right, well we just take a few steps back.

\[4\pi r^2\]
\[4\pi 38^2\]
\[4\pi 1444\]
\[5776\pi\]

Answer 38

its basically the same thing we just did, but this time we did multiply the equation with \[\pi\]

Answer 39

didnt* not did

Answer 40

so how do i know which is the answer

Answer 41

i have a feeling youre still not getting it

Answer 42

sorry im just nervous!

Answer 43

i have to finish my class before 12 and its gonna be 12 soon

Answer 44

well look at the explanation i just gave you :p it shows you what to do

Answer 45

can i ask you another question?

Answer 46

yes you may

Answer 47

Quadrilateral RSTU has vertices R (-3, 1) , S (-2, 3) , T (2, 3) , and U (3, 1). If you translate the quadrilateral four units down, what are the vertices of R'S'T'U'?

R' (-3, -3) , S' (-2, -1) , T '(2, -1) , and U' (3, -3)

R' (1, 1) , S' (2, 3) , T '(6, 3) , and U '(7, 1)

R' (-7, 1) , S' (-6, 3) , T '(-2, 3) , and U '(-1, 1)

R (-3, 3) , S (-2, 1) , T (2, 1) , and U (3, 3)

Answer 48

"since i was little i have not really been able to comprehend math"

I have heard this over and over and over. It is almost always a false belief. Maybe it is true in your case, but I have not seen it in your questions. At the moment, I don't believe you are stuck with it.

However, you seem oddly immune to the idea of one question per thread. Post on a new thread, please.

Answer 49

Yes, please post a new thread, Leah

Answer 50

why do i have to post a new one?

Answer 51

Because users may get help from this thread, but its not gonna help with differenet questions all over the same thread :p

Answer 52

ill make a new one

Answer 53

Single Questions in a Single Thread are MUCH more likely to be useful to someone else. It is very difficult to index or search multiple discussions on a single thread.

Answer 54

Danke

Answer 55

Beat ya to it Tk ;)

Answer 56

I used bigger words. :-)

Answer 57

haha touche