the sales of a certain product after an inital release can be found by the equation s=17sqrt4t+61

Question

mathmale · Answer

Yes?  What is the goal of this problem?  What's your aim?

anonymous · Answer

s represents the total sales and t represents the time in weeks after release. How many weeks will pas before the product sells about 125 units?

mathmale · Answer

$$s=17\sqrt4t+61.or.s=17\sqrt(4t+61)?$$  Which one did you mean?

unklerhaukus · Answer

sub in s= 125,   and solve for t

anonymous · Answer

the first one s = 17sqrt 4t) +61

unklerhaukus · Answer

?
$$s=12\sqrt{4t}+61$$

anonymous · Answer

instead of 12 it's 17

unklerhaukus · Answer

$$s=17\sqrt{4t}+61$$
$$s=125$$
$$125=17\sqrt{4t}+61$$

anonymous · Answer

so then would I subtract 61 from both sides?

unklerhaukus · Answer

yes!,

mathmale · Answer

Your goal is to determine the time, t.

anonymous · Answer

once I have that it's 
$$64=17\sqrt{4t}$$

unklerhaukus · Answer

good work, now divide both sides by 17 ,

anonymous · Answer

I got $$3.76=\sqrt{4t}$$

unklerhaukus · Answer

what's the next step to get rid of that √  ?

anonymous · Answer

square both sides?

unklerhaukus · Answer

Yes, square both sides !

anonymous · Answer

divide by 4 and then that would be my answer?

unklerhaukus · Answer

yeah thats right , you should be left with 
... = t   [in weeks]

anonymous · Answer

I got 3.54, but I rounded that up so it's 4 weeks

unklerhaukus · Answer

The question specifically asks  'How many weeks will pass before 125' units are sold,   so i think you have to round down instead