Question

two spherical chocolates are filled with a cream filling. the space inside one chocolate has a radius of 3 cm the other has a radius of 4.5 cm. how much more cream filling is in the larger chocolate than the smaller chocolate. estimate your answer to two decimal places @hartnn

Answer 1

plz help

Answer 2

do you know the formula for the volume of a sphere ?

Answer 3

v= (4/3) * 3.14 * (radius ^ 3)

Answer 4

this problem is asking you to find the volume of the big sphere (with radius 4.5)
then find the volume of the smaller sphere (r=3)
then subtract big - small to get how much bigger the big one than the small one.

can you find the volume of the big sphere?

Answer 5

381.51

Answer 6

calculater helps

Answer 7

ok but keep at least 3 decimals (because we will round to 2 decimals at the end)

Answer 8

now do the same for the smaller sphere

Answer 9

also, if you are using a calculator , use the "pi" key because it is more accurate than 3.14

Answer 10

72 pi

Answer 11

it says on question to use 3.14 to estimate so i do but because you say not to i wont

Answer 12

if they say use 3.14 then you should use 3.14
but (unfortunately) they are being a bit stupid... you cannot get 2 decimals of accuracy if you start with only 2 decimals.

using pi=3.14 you get 381.51 (as you found, and what we should use)
but if we use pi=3.14159 we get 381.703 ...

Answer 13

the answer should be
381.51 - 113.04

Answer 14

ok

Answer 15

268.47

Answer 16

yes.

Answer 17

thank you

Answer 18

be sure they really wanted you to use 3.14.
otherwise, the answer would be
4/3 * pi * ( 4.5^3 - 3^3) = 268.606171881927
or approx 268.61 rounded to 2 decimal places

Answer 19

thats what it says

Answer 20

you might want to mention to your teacher that this question has a problem with it.

Answer 21

i will