I am Stuck on these problems

Question

The following formula describes the recent profit, P, in thousands of dollars, for a
company that just implemented a new marketing campaign. The variable, t, is time, in weeks, after
the campaign launch.

 

?? = 9√?? + 20

 

a.  What is the profit one week after the campaign is launched (?? = 1)?
b.  What is the profit four weeks after the campaign is launched (?? = 4)?
c.  What is the profit 25 weeks after the campaign is launched (?? = 25)?

Answer 1

If the equation is P(t) = 9√t + 20 then  

 

P(1) = 9*1 + 20 = 29

P(4) = 9*2 + 20 = 38

P(25) = 9*5 + 20 = 65