Question

Please help me on this

Answer 1

C. 4 weeks

Explanation:

We have the formula

`s = 16 √(7t) + 62`

We are looking for the value of t (number of weeks) when s = 150.

So, we isolate t (well, almost isolate, because it would be hard to read)

`((s - 62)/(16) )^(2)  = 7t`

If we replace s by 150 we get:

`7t = ((150 - 62)/(16) )^(2) =  ((88)/(16) )^(2) =  (5.5 )^(2) = 30.25`

We have 7t = 30.25. If we divide both sides by 7 we get the number of weeks: 4.32... so rounding it down to 4.