4. Brualio buys a new truck for $22,000. The truck depreciates at a rate of 15% per year. Which equation models the value, V(t), in dollars, of the truck after t years? a) ()=22,000(0.85) c) ()=22,000(0.15) b) ()=22,000(−0.15) d) ()=22,000(−0.85)