Answer:
option D. 4.7 x 10-4 m
Step-by-step explanation:
<u><em>The correct question is</em></u>
• cell P: 5.0 x 10-4 meters
• cell Q: 3.0 x 10-5 meters
we have
The diameter of cell P is 
The diameter of cell Q is 
Rewrite the diameter of cell P as

Find the difference

Rewrite the difference as

Simplify the following:
(25/a - a l)/(a + 5)
Put each term in 25/a - a l over the common denominator a: 25/a - a l = 25/a - (a^2 l)/a:
(25/a - (a^2 l)/a)/(a + 5)
25/a - (a^2 l)/a = (25 - a^2 l)/a:
Answer: ((25 - a^2 l)/a)/(a + 5)
Probably $87 based on the information I was given.
Steps?
A graph shows zeros to be ±3. Factoring those out leaves the quadratic
(x-2)² +1
which has complex roots 2±i.
The function has roots -3, 3, 2-i, 2+i.