A6. The number of bacteria increases by one-eighth in 1 hour. In the laboratory, they placed $3,6 \cdot 10^{7}$ bacteria in a special container. How many bacteria were in the container after $t$ hours?
(A) $3600000 \cdot 1,125^{t}$
(B) $3,6 \cdot 10^{7} \cdot 0,875^{t}$
(C) $b=0,36 \cdot 10^{7}+1,125^{t}$
(D) $b=36 \cdot 10^{6} \cdot 1,125^{t}$
(E) $b=0,36 \cdot 8 \cdot 1,8^{t}$

## II. PART
A6. If at the beginning there are $3.6 \cdot 10^{7}$ bacteria, after one hour there are $3.6 \cdot 10^{7} \cdot 1.125$, after two hours $\left(3.6 \cdot 10^{7}\right.$. $1.125) \cdot 1.125=3.6 \cdot 10^{7} \cdot 1.125^{2} \ldots$ After $t$ hours, there are $3.6 \cdot 10^{7} \cdot 1.125^{t}=36 \cdot 10^{6} \cdot 1.125^{t}$ bacteria in the culture.

## II. PART