http://prntscr.com/af58o0 @imqwerty

Question

hayhayz · Answer

I think it is 9.72

imqwerty · Answer

yeah correct! :)

mathmale · Answer

this is a problem involving geometric sequences and geom. series.
Please review those two topics.
Draw a picture to make things clearer for yourself.
What is the common ratio?
What is the first term of this sequence or series?

imqwerty · Answer

did you do it the way we did the previous problem? :)

hayhayz · Answer

I got the equation 3-3x0.7^10 / 1-0.7

mathmale · Answer

If you'd please share all of your work, you'd get more meaningful feedback than if you just present an answer for confirmation.

Write out the formula for the nth sum of a geometric series.  That's the basis for this work.

imqwerty · Answer

yes that is correctt
just applied a little latex to your equation-
$3 \left( \large \frac{1-0.7^{10}}{1-0.7} \right)$

hayhayz · Answer

$$3-3*0.7^{10}\div1-0.7$$

mathmale · Answer

Even better, please enclose that 1 - 0.7 in parentheses to eliminate ambiguity about order of operations.

hayhayz · Answer

yea lol i dont know how to do the latex..  but then i get 2.915.. divided by 0.3 and get 9.72 :)

mathmale · Answer

I've found that it helps me a lot to sketch this situation.