Answer:
A new car costs $23,000. The value decreases by 15% each year.
An exponential model to represent the car's value after t years:
y = 23000 x (1 - 15/100)^year
= 23000 x (0.85)^year
Hope this helps!
:)
Given:
Cost price (C.P.) = $4 per box
Selling price (S.P.) = $12 per box
To find:
The percent of markup based on cost.
Solution:
We know that,
On substituting the given values, we get
Therefore, the percent of markup based on cost is 200%.
Plug the x-value into the original equation to get the y-value. Now that you know the x-value, just plug it in to the original formula for the y value. You can think of the formula for finding the vertex of a quadratic function as being (x, y) = [(-b/2a), f(-b/2a)].