Question

Find a volume of a seedless orange with radius 5cm. 523.60cm
1) suppose the peel of the orange is 0.5cm thick.What volume of the orange is eddible?
2)Express the edible part of the orange as a percent of the whole orange.Round your answer to the nearest percent.
Could u explain 1) & 2) solving?
Thanks.

Answer 1

Is the orange a perfect sphere?

Answer 2

pls help me

Answer 3

yes

Answer 4

lol ok, what's the volume of a sphere formula?

Answer 5

v=4TTr3/2

Answer 6

should look like this:

v = (4/3)PI(r)^3

Answer 7

now for question 1) , plug in the radius of the orange for r... like this...

v = (4/3)PI(5)^3

Answer 8

yes i did that

Answer 9

ok, so if you want to know the portion that is edible, minus the portion that is not edible, namely 0.5... so now use a radius of 4.5cm and you'll have it...

Answer 10

i did 5.0 - 0.5 and got 4.5

Answer 11

cool, so you need to know the volume of the whole orange, and the volume of the edible part to find the percentage.. Please post the two volumes, and then we'll find the percentage that is edible..

Answer 12

volume of the whole orange = 523.60 volume of the edible part = 380.51

Answer 13

volume of edible part = 381.51 i mean

Answer 14

523.6 is the whole and 381.7 is the part of the edible part...

Answer 15

how did you get 380.70?? i know that is the right answer but i keep on getting 381.51

Answer 16

I didn't get 380.70 I got 381.7

anyway, now we ask "what percent of 523.6 is 381.7"

that equates to:

x(523.6) = 381.7

Answer 17

wait but where is the x coming from?

Answer 18

now dividing both sides gives 0.72899... and moving the decimal to percent..

72.899%

and rounding...

73% of the orange is for eats.. but personally I like the peel!!! lol

Answer 19

your a genius!!

Answer 20

oh, the x is "what percent" "what percent" is x

of (means times)

is means (equals)

what percent of bla1 = bla2

x times bla1 = bla2

x(bla1) = bla2

x = bla2/bla1

Answer 21

ohhhh. hehe i personally like the of the orange. (:

Answer 22

You'll get it.. learn to turn what you can say into algebra expressions. It gets easy with practice just like speaking! :)

Answer 23

but hard at first..

Answer 24

ok. well thanks.

Answer 25

np