The answer is 8.
Ratio is a relationship among two numbers representing how many times the first number contains the second. The tip with ratios is to constantly multiply or divide the numbers by the same value.
When you multiply each number by four the sum will be 28.
2 x 4 = 8
5 x 4 = 20
The total is 28.
I hope this helps! Happy Holidays! <3
The tripling time of population is 6 days and the population will be doubled in 3.5 days.
Given that the population of a bacteria is tripling in 6 days.
We have to find the tripling time of population and the time when the population will be doubled.
Suppose the population of bacteria in beginning be x.
The population of bacteria seems like arithmetic progression in which a =x, nth term =3x and n=6.
Aritmetic progression is a sequence which is having common difference.
nth term=a+(n-1)d
3x=x+(6-1)*d
3x-x=5d
2x=5d
d=2x/5
d=0.4x
So now we have to find the value of n where population will be 2x.
nth term=a+(n-1)d
put nth term=2x, a=x,d=0.4x
2x=x+(n-1)*0.4x
2x-x=(n-1)*0.4x
x/0.4x=n-1
2.5=n-1
n=2.5+1
n=3.5
Hence the population of bacteria willbe doubled after 3.5 days.
Learn more about arithmetic progressions at brainly.com/question/6561461
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Answer:
Exact Form: 23/4
Decimal Form: 5.75
Mixed Number Form: 5 3/4
Step-by-step explanation:
Hope this helps! <3
Well, I'm not sure what units "0.5" apply to, but to find the distance he rode, you will need to multiply.
0.5 * 24 = 12.
Barry rode his scooter for a distance of 12 [insert units here].
Hope this helps! Have a great day :)
The answer is 21/34.
There are in total 34 children: 20 girls + 14 boys = 34 children
There are in total 11 seniors: 7 senior girls + 4 senior boys = 11 senior children
When we have two events that do not occur together, so only one of the events can happen (<span>there is OR in a sentence), then we use the addition rule and add up probabilities of the events. We have two events not occurring together:
</span>1. The probability of selecting a boy is 14/34 (because there are 14 boys among 34 children).
2. The probability of selecting a senior is 11/34 (because there are 11 seniors among 34 children).
Now, we just need to add them up. However, we have already counted 4 senior boys in the probability of the first event and thus, must subtract the probability of selecting a senior boys (4/34):
14/34 + 11/34 - 4/34 = (14+11-4)/34 = 21/34