Answer:
a) P=0.558
b) P=0.021
Step-by-step explanation:
We can model this random variable as a Poisson distribution with parameter λ=1/500*2000=4.
The approximate distribution of the number who carry this gene in a sample of 2000 individuals is:

a) We can calculate that the approximate probability that between 4 and 9 (inclusive) as:


b) The approximate probability that at least 9 carry the gene is:



Is it a rhombus or is it just a parallelogram?
Answer:
The question seems not to be complete, below is a possible complete question:
Kristin earns $6.50 for every hour she babysits for the Overstreet family. Part A: Last Friday, Kristin babysat for 4.5 hours. How much money did she make during that job? $__________ Part B: Mrs. Overstreet has told Kristin that she will pay her $45.50 for tomorrow's babysitting job. How many hours will Kristin babysit then? __________ hours
Answers:
Part A: She makes $29.25
Part B: She babysat for 7 hours
Step-by-step explanation:
Part A:
amount earned per hour = $6.50
Number of hours worked = 4.5 hours
1 hour = $6.50
∴ 4.5 hours = 6.50 × 4.5 = $29.25
part B:
total amount to be earned = $45.50
earning rate = $6.50 per hour

I hope this helps you
x^2/3 [x^2/3.x^-1/4)^6.1/3.2
x^2/3[x^8-3/12]^4
x^2/3 [x^5/12]^4
x^2/3.x^5/12.4
x^2/3.x^5/3
x^2+5/3
x^7/3