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Exponential Growth and Decay

The Graph of $f\left(x\right)=a^x$

Initially, one student had the flu.
The number of students who get the flu doubles every day.
Let time ($x$) be the number of days after day zero ($x=0$).

Complete the table for the number of students with the flu, $B$, on day $x$.
$x$ $0$ $1$ $2$ $3$ $4$ $5$ $6$ $7$
$B\left(x\right)$


Fill in the table with your values.

Find a model for $B\left(x\right)$ and enter it in Desmos above.$\qquad B\left(x\right)=$

Find the number of bacteria (in thousands) in the sample 4.5 hours after the initial time.
Enter $x=4.5$ in Desmos and find the intersection. Give your answer to 3 decimal places.

Find $x$ when the number of bacteria in the sample reaches 100,000.
Enter $y=100$ in Desmos and find the intersection. Give your answer to 3 decimal places.