Aplumber charges a service call fee of $25 plus $40 for each hour she works. which variable is the independent variable?

a. the total cost of the plumber's services for a service call

b. the number of hours the plumber works on a service call

c. there is no relationship between the variables

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

Which best describes a central bank's primary goals? limiting inflation and reducing unemployment reducing unemployment and maintaining cash flow controlling stagflation and reducing unemployment managing credit and ensuring the money supply's liquidity