Answer:
9/22 or 40.9%
Explanation:
Probability describes the likelihood of an event. To find simple probability, like in this question, use division.
To find the probability of the first question being a free response, you first need to find the total number of questions. This can be done by adding together all of the given information. There are 10 multiple choice, 3 essays, and 9 free responses.
This means that there are 22 total questions. Next, find how many of these questions are free-response. We know that there are 9 free responses and 22 questions in total. So, 9 out of 22 are free responses. This can be rewritten as 9/22.
If you want to find the percentage, simplify the fraction and convert it to a percentage.
Then, move the decimal 2 places to the right. This gives you 40.9%, which is the probability of the first question being a free-response.
Answer:
Whatever you think the answer is, go with it. Believe that you have the answer correct, and you will.
Explanation:
Believe in yourself.
Answer:
A habitat
Explanation:
A habitat is a natural environment which shelters living organisms of the same species. In a species habitat, species can be sheltered, fed and can also mate to reproduce offsprings. A habitat has both physical and biological characteristics. Representing the physical factors are soil, moisture, temperature range and intensity of light. While those representing the biological factors are the presence of prey and predators as well as other things. Most organisms or species adapt to strive which others might try to live up to their inbuilt habitat needs. A habitat does not necessarily refer to geographical area but can also be within the soil or inside of a branch or stem or other things which a living organism can live in. Homeostasis is essential in living organisms in a habitat because it helps to control and maintain them in optimum conditions which might have been necessary through adversary or habitat change.
Exactly 80 liters of 20% are needed.
Let quantity of 20% alcohol solution be added : x liters
Here is the work:
> x*20% + 40 * 50% = (x+40) * 30%
> x*0.2 + 40*0.5 = (x+40)*0.3 ..(converting percentages into decimal)
> 0.2x + 20 = 0.3x + 12
> 20-12 = 0.3x - 0.2x (Rearranging similar terms)
> 8 = 0.1 x
Hence x = 8/0.1
Ans 80 Litres
