Which of the following formulas are exponential?
A) $ P(t)=8.9(1.21)^{t}$
B) $ P(t)=1.89-9.68 t$
C) $ P(t)=17.8^{t}+40.05 t-22.25$
D) $ P(t)=(1.4641)^{t} 2670$
E) $ P(t)=178 e^{2.42 t}$
F) $ P(t)=1.78 e^{-0.605 t}$
G) $ P(t)=(4.45+12.1 t)^{t}$

Question

Quizplus · Accepted Answer

Exponential functions have the form $ a \cdot b^t $ or $ a \cdot e^{kt} $, where $ a $ and $ b $ or $ e $ are constants, and $ t $ is the variable. Choices A, D, E, and F fit this form.

Which of the Following Formulas Are Exponential? A) P(t)=8.9(1.21)t P(t)=8.9(1.21)^{t}P(t)=8.9(1.21)t B) P(t)=1.89−9.68t P(t)=1.89-9.68 tP(t)=1.89−9.68t

Which of the Following Formulas Are Exponential?
A) $P(t)=8.9(1.21)^{t}$ B) $P(t)=1.89-9.68 t$