The battery life of a certain cell phone starts at 8 hours. The battery life decreases at an annual rate of 30%. Write a function that represents the battery life y after x years. After how many years will the battery life of a cell phone be 2 hours?

eve and marks ratios are equivalent

step-by-step explanation:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

sorry i got nothing

step-by-step explanation: