4. a used car was purchased for $12,329 this year (2017). each year the car’s value decreases 8.5%.
a. write an exponential equation describing this situation.

b. what will the car be worth in 2020

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above