SAT MATH • ANSWER CHECK
Exponential Models
Complete the practice first, then open each answer to check your work. These answers match the revised September 2026 worksheets.
For a wrong answer, identify the cause: concept, algebra, arithmetic, interpretation, calculator choice, or timing. Equivalent exact numerical forms are accepted for these practice exercises.
Question 1
Answer: A
A. increases 8% every 2 years
Question 2
Answer: A
A. decreases 30% every 3 months
Question 3
Answer: A
A. v=75(2)^((t)/(10))
Question 4
Answer: B
B. v=75(2)^((3t)/(2))
Question 5
Answer: B
B. $11,150
Question 6
Answer: D
D. decreasing linear
Question 7
Answer: B
B. P=40(1.25)^(t)
Question 8
Answer: D
D. 18000(0.93)^((t)/(5))
Question 9
Answer: C
C. floor area increases by 250 square feet each year
Question 10
Answer: A
A. m=64,n=20
Question 11
Answer: D
D. 20(1.03)^(2t)
Question 12
Answer: 360
Question 13
Answer: 360
Question 14
Answer: C
C. q=20(0.65)^(x)
Question 15
Answer: C
C. increasing linear
Question 16
Answer: 5400
Question 17
Answer: Approximately 6.58 years
Solve 0.9^t = 0.5. The model reaches half value at about 6.58 years; seven complete annual reductions put it below half.
Question 18
Answer: Approximately 11.51 years
Solve 0.96^t = 7500/12000.
Question 19
Answer: 15.9%
Question 20
Answer: D
D. after 5 years, predicted value is about $146
Question 21
Answer: 1