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3 years ago

The United States has about 34,000,000 telephones. The rest of the world has about 23,000,000 telephones.

Mathematics

2 answers:

NikAS [45]3 years ago

4 0

Answer:

57,000,000

Step-by-step explanation:

1. Sum the numbers 34,000,000 + 23,000,000= 57,000,000

tensa zangetsu [6.8K]3 years ago

4 0

Answer:

57,000,000

Step-by-step explanation:

34,000,000+23,000,000=57,000,000

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Answer:

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3 years ago

Dorothy and Rosanne are baking cookies for a party. Working alone, Rosanne can finish the cookies in 6 hours. Dorothy can finish

garik1379 [7]

Answer:

It will take them 3.43 hours.

Step-by-step explanation:

Let T denote the total cookies that need to be cocked. Observe that:

If Rosanne finishes the cookies in 6 hours, that means that she can make $\frac{T}{6}$ cookies per hour.
If Dorothy finishes the cookies in 8 hours, that means that she can make $\frac{T}{8}$ cookies per hour.

Then, by 1) and 2), if they work together would we able to make

$\frac{T}{6}+\frac{T}{8}=\frac{8T+6T}{48}=\frac{14}{48}T=\frac{7}{24}T$

cookies per hour.

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