After a special medicine is introduced into a petri dish containing a bacterial culture, the number of bacteria
1
remaining in the dish decreases rapidly. The number of bacteria decays by a factor of
15
minutes, and can be modeled by a function, N, which depends on the amount of time, t (in minutes).
every 6.7
Before the medicine was introduced, there were 90,000 bacteria in the Petri dish.
Write a function that models the number of bacteria t minutes since the medicine was introduced

the anwser is d) 75°

step-by-step explanation:

the answer is $42.96

step-by-step explanation:

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation: