Solve the Problem $Q ( t ) = 4 e ^ { - 0.00938 t }$

question 226

Multiple Choice

Solve the problem.
-If the function $Q ( t ) = 4 e ^ { - 0.00938 t }$ models the quantity (in $\mathrm { kg }$ ) of an element in a storage unit after $t$ years, how long will it be before the quantity is less than $1.5 \mathrm {~kg}$ ? Round to the nearest year.

• A) \(105 \mathrm { yr }\)
• B) \(31 \mathrm { yr }\)
• C) \(45 \mathrm { yr }\)
• D) \(4 \mathrm { yr }\)