The concentration of bacteria B in millions per milliliter after x hours is given by B(x)=1.33e^0.15x. After how many hours will
there be 31 million bacteria per milliliter?
1 answer:
Answer:
21 hours
Step-by-step explanation:
You want to find x such that B(x) = 31. Fill in the value and solve.
... 31 = 1.33e^(0.15x)
... 31/1.33 = e^(0.15x) . . . . divide by 1.33
... ln(31/1.33) = 0.15x . . . . take the natural log
... ln(31/1.33)/0.15 = x ≈ 20.992 . . . . hours
After 21 hours, the concentration will be 31 M/mL.
You might be interested in
The Tampa Tribune expecting to add 700 new pictures per year to their database in 2041
<h3>The linear equation of the graph</h3>The equation of the line of best fit is given as:
When the number of pictures added is 700, we have:
y = 700
Substitute 700 for y in
Subtract 367 from both sides of the equation
Rewrite the above equation as:
Divide both sides by 8
Remove decimal (do not approximate)
This means that:
Hence, the Tampa Tribune expecting to add 700 new pictures per year to their database in 2041
Read more about linear regression at: