Answer:
12
Explanation:
GIven: an isosceles trapezoid ABCD with AD = 28, BC = 12, and BE = 9.
We can see that triangle BEA is a right triangle, so let's use the Pythagorean Theorem to solve for length AB.
To use the Pythagorean Theorem, we need the lengths of both legs. But we only have one! So let's solve for AE.
Now we know the lengths of both legs of right triangle BEA, so let's use the Pythagorean Theorem to solve for the hypotenuse, AB!
Pythagorean Theorem: 
where 
and 
are the legs and 
is the hypotenuse.
≈ 
A desert forms when rainfall decreases in a dry climate
Answer: Economics affects our daily lives in both obvious and subtle ways. From an individual perspective, economics frames many choices we have to make about work, leisure, consumption and how much to save. Our lives are also influenced by macro-economic trends, such as inflation, interest rates and economic growth
Explanation:
It seems you need to move the decimal three times over, then you round the number. So the answer would be 5.5 x 10^3.
