In a certain state, the sales tax is given by the function t(p)=0.0635p, where p is the price of the item. The sales tax rate is ___%
t(p) =0.0635p
The tax is actually =0.0635, since p is the price.
0.0635 = (635 / 10000) * 100% = 6l.35%
Tax rate = 6.35%
Hope this explains it.