3
Given: P = 20700, r = 11% = 0.11, t = 11 years
Depreciation formula: P = P (1 - r)^t
P = 20700 * (1 - 0.11)^11
P = 20700 * 0.89^11 = 20700 * 0.281 = 5817.7
Answer: = 5818
Added 17 days ago|2/16/2026 6:54:46 AM
This answer has been confirmed as correct and helpful.
3
Given: m = 490 g, decay rate r = 28.6% = 0.286, t = 16 min
Remaining mass: m = m * (1 - r)^t
m = 490 * (1 - 0.286)^16
m = 490 * 0.714^16 = 490 * 0.00137 = 0.7 g
Answer: 0.7 g
Added 17 days ago|2/16/2026 6:55:19 AM
This answer has been confirmed as correct and helpful.
