SOLUTION: 5. The percentage of adult height obtained by a boy x years old is modeled by the function. f(x)=29+49log(x+1). a. Approximately what percentage of his adult height 9 year-old? b

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: 5. The percentage of adult height obtained by a boy x years old is modeled by the function. f(x)=29+49log(x+1). a. Approximately what percentage of his adult height 9 year-old? b      Log On


   



Question 1059909: 5. The percentage of adult height obtained by a boy x years old is modeled by the function. f(x)=29+49log(x+1).
a. Approximately what percentage of his adult height 9 year-old?
b. At what age will a boy reach 90% of his adult height

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


a. Substitute 9 for x and then do the arithmetic.

b. Substitute 0.90 for f(x) and then solve for x.

John

My calculator said it, I believe it, that settles it