A restaurant purchased a 72-in. range with six burners for $6982. The value of the range each

Question:

A restaurant purchased a 72-in. range with six burners for $6982. The value of the range each year is 85% of the value of the preceding year. After t years, its value, in dollars, is given by the exponential function
V(t) = 6982(0.85)t.
a) Graph the function.
b) Find the value of the range after 0, 1, 2, 5, and 8 years.
c) The restaurant decides to replace the range when its value has declined to $1000. After how long will the range be replaced?