Suppose the sales tax in a certain city is defined by the function t=f(c) and t=$0.055c, what is f (10.00) ?

t = f(c)


t = $0.055c





f(10.00)


= $0.055(10.00)


= $0.55





Thus, sales tax = $0.55

Suppose the sales tax in a certain city is defined by the function t=f(c) and t=$0.055c, what is f (10.00) ?
Okay, you're given c. It's 10.00: notice the similar structure in f(c) and f(10.00).


You're also given t: t = $0.055c = f(c)


So, just plug 10.00 in for c. That is, t = $0.055x10.00.


You can figure that out yourself!
Reply:f(c) = t


f(10) = 0.055(10)


f(10) = 0.55