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2 answers:
Answer:
C
Step-by-step explanation:
1. π ≈ 3.1415. π + 10 ≈ 13.1415.
2. Find the square root of 20. It is about 4.4721. 4.4721 + 1/2 (or .5) = 4.9721
3. The square root of 100 is 10.
4. Order them.
5. It is most obvious that the answer to + 1/2 is first. The square root of 100 is ten, so that goes second because pi + 10 is greater than 10. (pi + 10 goes last)
6.
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ANSWER
Emma is 44" tall
EXPLANATION
We have that David cast a shadow 42 inches long and he is 66 inches tall.
At that same place and time, Emma cast a shadow of 28 inches.
Since they are at the same spot and time, we can conclude that the ratio of their height to shadow must be the same.
Let Emma's height be x.
The ratio of David's shadow to height is:
42 : 66 or 42 / 66
For Emma, it is:
28 : x or 28 / x
That means that:
So, Emma is 44" tall.