Melody

Maybe.

(sqrt(36))^3 = 216

This is the second part of your last question.

Don't you even have enough understanding to know that ?

Omi and I both answered the first part and you did not even have the decency to respond.

EP is asking you a question

Do you mean 3.2% for day or per hour or per what?

Compute . Express your answer in base 3.

\(121_3+2122_3-1200_3-2111_3\\ =(121_3+2122_3)+(1200_3-2111_3)\)

Just doe it the same as any primary school addition and subtraction. Except it is base 3 not base 10 so you carry lots of 3 not lots of 10.

I have put each digit in a column. The 'carry' and the 'not' were added as I did the calculations.

121_3+2122_3-1200_3-2111_3

The first one is bigger than the second one s the answer will be negative

Get the absolute value by subtracting the second from the first

so

\(​​10020_3-11011_3=-(11011_3-10020_3)=-221_3\)

How about

\(\frac{3}{2}*20=d\)

Where d is the number of days that she walks.

It is always a pleasure to help you Juriemagic     

Yes it would have been a misprint.  :)

or a poor print  ;)

Hi Juriemagic :)

\(\sqrt{-5}=\sqrt{5*-1}=\sqrt5*\sqrt{-1}=\sqrt5\;i\)

So your mistakes strat in the third row.

\(\sqrt{-5}(\sqrt{-3}*\sqrt{-4})\\ \sqrt5*\sqrt3*\sqrt4*i*i*i\\ 2\sqrt{15}*-1*i\\ -2\sqrt{15}\;i\)

This is different from your answer but different from your book too.  

Are you sure you copied in the book answer correctly?