It means 1.8 × 10 to the tenth power. the E is a ten are you working with scientific notation
The answer is 21x-25 because all you have to do is multiply the 1/4 by the 84x and then multiply 1//4 by negative 100. A simpler way of explaining this is just that you need to distribute
Ultimately Woodrow Wilson's preferred direction was not to get involved
with the internal affairs of the USA's near neighbors in Latin America.
However events unfolded that meant his governments ended up being as
interventionist as those of Teddy Roosevelt, for example occupying Haiti
and the Dominican Republic. These activities were not intended plans of
Wilson's in the way that Roosevelt set out to police Latin America but
nonetheless the impact was the same.
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It is rounded to the nearest tens. You can only round when you have 1,9. Hope I helped
Find the hight and the base that might help
