Which are examples where exponential growth or decay are required to solve the problem? Select all that apply.

An economist estimates the tax-paying population in 10 years given the current rate of change.
A health physicist must determine when radiation levels in soil will be safe for crop production.
An automotive engineer needs to test tire safety during high rates of acceleration by a sports car.
An engineer calibrating a gram scale needs to calculate the spring constant.
A tactical engineer must trace the path of a missile for 90 seconds after its launch.