Figure 4, Future climate prediction for North America. By 2100, the low-emissions scenario (550 ppm CO2, left) and high-emission
s scenario (800 ppm CO2, right) show dramatic precipitation changes. Tan and brown colors show that an area is expected to receive less precipitation, while blue colors show that an area is expected to receive increased precipitation. The image is edited.
According to Figure 4: Climate Projections, how will Las Vegas change by 2100?
options:
You can not tell from this image.
Las Vegas is likely to stay the same.
Las Vegas is expected to receive increased precipitation.
Las Vegas is expected to receive less precipitation.
According to Figure 4: Climate Projections, how will Las Vegas change by 2100?
options:
You can not tell from this image.
Las Vegas is likely to stay the same.
Las Vegas is expected to receive increased precipitation.
Las Vegas is expected to receive less precipitation.
1 answer:
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Answer:
The first one.
Explanation:
When comparing two fractions with variables like this, it's important to get to the same denominator in order to compare apples with apples and then be able to do not only comparisons but also perform additions/subtractions.
Question is which denominator to use and how to reach it.
In this case, the question and the answer choices do the work for you. The question asks which one is the LEAST common denominator, and the answers show denominators x² and 4x². The smallest of these is x², however, we can't simplify the first fraction to get to the x² denominator, so we'll go for the 4x².
So, the first fraction has already the correct denominator (4x²), we just have to transform the second one.
We multiply it by 1, expressed in a different way. Since we're multiplying by one, we're not affecting the value, just the way it looks.
Let's do it!, to get the denominator to go from x² to 4x², we need to multiply it by 4... so we'll multiply by 4/4 (which is 1, neutral for the multiplication).
And now you have both fractions on the same denominator, without having changed their value, just their looks