An environmental protection group had its members sign a pledge to try to reduce the amount of garbage they throw out by 3% each year. On the year that the pledge was signed, each person threw out an average of 1,800 pounds of garbage. Which exponential function could be used to model the average amount of garbage each person who signed the pledge should throw out each year after signing the pledge?
A. y = 0.97 × 1,800t
B. y = 1,800 × t0.97
C. y = 1,800 × 1.97t
D. y = 1,800 × 0.97t
Answer:D
An environmental protection group had its members sign a pledge to try to reduce the amount of garbage they throw out by 3% each year. On the year that the pledge was signed, each person threw out an average of 1,800 pounds of garbage. Which exponential function could be used to model the average amount of garbage each person who signed the pledge should throw out each year after signing the pledge?
A. y = 0.97 × 1,800t B. y = 1,800 × t0.97 C. y = 1,800 × 1.97t D. y = 1,800 × 0.97t
Explanation: D