Answer:

Step-by-step explanation:
Let the first term be
, then the terms of the sequence are:
.
Since the fourth term is 108, we have


Hence the sequence becomes:
.
The explicit expression for a geometric expression is given by:

where a=4 and r=3
The required formula is:

The bacteria at the end of 22 hours is 2,480
Answer:
4:25
Step-by-step explanation:
Given that,
r₁ = 15 inches, r₂ = 6 inches
The area of the cylinder is given by :

The ratio of surface areas of two cylinders,

Hence, the required ratio is 4:25.
<h2>
Hello!</h2>
The answer is: The correct dose of medication to give is 5.6 mL
<h2>
Why?</h2>
To solve this problem we need to establish a relationship between the prescripted medication and the available solution.
Let's write the needed equations to establish the relantionship:

The available solution means 125 mg each 5 mL of solution, so:

Hence, the correct dose of medication to give is 5.6 mL of the 125 mg/5mL solution.
Have a nice day!