Answer:
C. 4 weeks
Step-by-step explanation:
We have the formula
[tex]s = 16 \sqrt{7t} + 62[/tex]
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)
[tex](\frac{s - 62}{16} )^{2} = 7t[/tex]
If we replace s by 150 we get:
[tex]7t = (\frac{150 - 62}{16} )^{2} = (\frac{88}{16} )^{2} = (5.5 )^{2} = 30.25[/tex]
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.
