# Virus

We have a virus that lives one hour. Every half hour produce two child viruses. What will be the living population of the virus after 3.5 hours?

Result

x =  1224

#### Solution:

$0.0 h \ @ \ n = 1 \ \\ 0.5 h \ @ \ n = 1 + 2 - 0= 3 \ \\ 1.0 h \ @ \ n = 3 + 6 - 1= 8 \ \\ 1.5 h \ @ \ n = 8 + 16 - 2= 22 \ \\ 2.0 h \ @ \ n = 22 + 44 - 6= 60 \ \\ 2.5 h \ @ \ n = 60 + 120 - 16= 164 \ \\ 3.0 h \ @ \ n = 164 + 328 - 44= 448 \ \\ 3.5 h \ @ \ n = 448 + 896 - 120= 1224 \ \\ x=1224$

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

## Next similar math problems:

1. Population
What is the population of the city with 3% annual growth, if in 10 years the city will have 60,000 residents?
2. Seats
Seats in the sport hall are organized so that each subsequent row has five more seats. First has 10 seats. How many seats are: a) in the eighth row b) in the eighteenth row
3. Multiples
Find all multiples of 10 that are larger than 136 and smaller than 214.
4. Median
The number of missed hours was recorded in 11 pupils: 5,12,6,8,10,7,5,110,2,5,6. Determine the median.
5. Scalar product
Calculate the scalar product of two vectors: (2.5) (-1, -4)
6. Theorem prove
We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
7. Logarithm
Determine the number whose decimal logarithm is -3.8.
8. Trinity
How many different triads can be selected from the group 43 students?
9. Six terms
Find the first six terms of the sequence a1 = -3, an = 2 * an-1
10. 75th percentile (quartille Q3)
Find 75th percentile for 30,42,42,46,46,46,50,50,54
11. Sequence - 5 members
Write first five members of the sequence ?
12. Classroom 4
In a class of 36 pupils, 2/3 are girls. How much it is in a class girls and boys?
13. Geometric progression
Fill 4 numbers between 4 and -12500 to form geometric progression.
14. Complex number coordinates
Which coordinates show the location of -2+3i
15. Discriminant
Determine the discriminant of the equation: ?
16. Number
Which number is 17 times larger than the number 6?
17. Log
if ?, what is b?