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The area of farmable land of town A close to the Sahara desert is currently 1300. After every year, the area of the farmable land decreases by 6%.

a)First construct an exponential decay equation:

(A) V = 1300(1 – 0.06)t

(B) V = 1300(1 – 0.60)t

(C) V = 1300(0.60)t

(D) V = 1300(10 – 6)t

b)When will the area of  the farmable land  be 900?

t =

(A) 6 years

(B) 7  years

(C) 5  years

(D) 4  years