Melody

Good luck Rosala,

But you will do fine :)

$$7m^6n^5$$

cannot be simplified

yes and 8 to the power (-2over 3) is   1/4

I like that Alan,

A head measured in feet.   Gets the imagination going that does. 

Thanks Alan,

So is there always  6x10^23 atoms in a mole (of anything) ?

Can you (or someone else) tell us a little about the significance of Avogadro's number? (Only if  is relatively easy to do.  )

Sasini, you have answered well but I do not think that you were intended to factorize it.

You really should state that that is what you have done.   ;)

2^4 =16 if you care about order

5 if you dont care about order.

It should not be over 100 rosala.

in my formula r will be a decimal

You will need to change it to a percentage.

The 100 where you have put it is definitely wrong.  😯

1102.25=1000(1+r)^2

1.10225=(1+r)^2

Sqrt(1.10225)-1=r

There you go Rosala.

I logged on with my phone just for y.  Can you finish it ?  ☺

That is excellent!