Y3 = 21
(y3) × 8 = 21 × 8

division property of equality

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Find the domain of the following expression: 1/(√x)-2

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x