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Mathematics 16 Online
OpenStudy (anonymous):

WILL GIVE MEDAL !!!

OpenStudy (anonymous):

Find the value. A. 2 B. 4 C. 8 D. 262,144

OpenStudy (anonymous):

the answer is B

OpenStudy (michele_laino):

please note that: \[64=4^{3}\]

OpenStudy (anonymous):

Find the side length of the cube with the given volume. A. 625 m B. 125 m C. 25 m D. 5 m

OpenStudy (sleepyjess):

@lesiss234 Please do not give direct answers.

OpenStudy (sleepyjess):

Do you have a guess on the second one?

OpenStudy (michele_laino):

If I call with x the side of your cube, the I can write: volume=V: \[V=x ^{3}\]

OpenStudy (michele_laino):

so V have to be a perfect cube number, so?

OpenStudy (anonymous):

idk 41?

OpenStudy (michele_laino):

please I don't understand

OpenStudy (sleepyjess):

What is the cube root of 125?

OpenStudy (sleepyjess):

x*x*x=125

OpenStudy (michele_laino):

namely: \[x=\sqrt[3]{125}\]

OpenStudy (michele_laino):

kepp in mind that: \[125=5^{3}\]

OpenStudy (anonymous):

the cube root of 125 is 5

OpenStudy (sleepyjess):

Yes!

OpenStudy (michele_laino):

that's right!, so

OpenStudy (michele_laino):

so, x=...?

OpenStudy (michele_laino):

if 5*5*5=125, then x=...?

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