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Carlos made a poster using construction paper. Which of the following is the best estimate for the length of the sign he made?

A. 30 feet
B. 30 yards
C. 3 feet

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Ashley bought a new Christmas tree, and it is 75 inches tall. The height of the old Christmas tree is 68 inches. How much taller is the new Christmas tree?

_____ inches

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Helen had saved enough money to buy a brand new refrigerator. Which one of the following is the best estimate for the height of a refrigerator?

A. 6 feet
B. 60 feet
C. 600 feet

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There are two bookshelves. The bookshelf on the left is 19 feet long and the rack on the right is 12 feet long. If the two bookshelves are side by side, what is the total length?

_____ feet

Answer :

Below is a detailed step-by-step solution:

1. For the question about Carlos's poster, we are asked to choose the best estimate for the length of the sign made from construction paper. Since construction paper is relatively small compared to yards or feet measured in multiples of 10, a reasonable estimate is about

[tex]$$3 \text{ feet}.$$[/tex]

2. In Ashley's question, the new Christmas tree is [tex]$75$[/tex] inches tall and the old Christmas tree is [tex]$68$[/tex] inches tall. To find how much taller the new tree is, we subtract the height of the old tree from the new tree's height:

[tex]$$75 - 68 = 7 \text{ inches}.$$[/tex]

3. For Helen's refrigerator question, we need a realistic estimate for the height of a refrigerator. Given common household sizes, the best estimate is approximately

[tex]$$6 \text{ feet}.$$[/tex]

4. Finally, for the bookshelf problem, there are two bookshelves, one is [tex]$19$[/tex] feet long and the other is [tex]$12$[/tex] feet long. Placing them side by side gives a total combined length found by adding the two measurements:

[tex]$$19 + 12 = 31 \text{ feet}.$$[/tex]

Thus, the answers are:

- Carlos's poster is approximately [tex]$3$[/tex] feet long.
- The new Christmas tree is [tex]$7$[/tex] inches taller than the old one.
- The refrigerator is about [tex]$6$[/tex] feet tall.
- The total length of the bookshelves is [tex]$31$[/tex] feet.

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