Raven purchases a new cell phone for $700 that depreciates annually. The value of her cell phone per year, x, can be modeled by the exponential function f(x)=700(0.86)^x. What is the range of this exponential function in terms of the context of the problem? a. (0,700] b. [0,∈fty ) c. (700,∈fty ) d. R
