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Katena32 [7]
3 years ago
9

A) Round 8.6078 to 2 decimal places

Mathematics
2 answers:
Lady bird [3.3K]3 years ago
8 0

Answer: 8.61

Step-by-step explanation: Since the third decimal (7) is greater than 5, the second decimal is rounded up. Therefore, 8.6078 rounded to two decimal places is 8.61.

Vlada [557]3 years ago
5 0

Answer:

8.6

Step-by-step explanation:

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Working together to palms can drain a certain pool in three hours if it takes the older pump nine hours to drain the pool by its
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Let's investigate first what is the fraction of the job done in the unit of time (hour in this case) by each pump if the work individually:

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newer pump: we don't know how long it takes (this is our unknown) so we call it "x hours". Therefore, in the unit of time (in one hour) it would have completed \frac{1}{x} of the total job.

both pumps together: since it takes both 3 hours to complete the job, in one hour they do \frac{1}{3} of the job.

Now, we can write the following equation about fractions of the job done:

<em>The fraction of the job done by the older pump plus the fraction of the job done by the newer pump in one hour should total the fraction of the job done when they work together.</em> That is in mathematical terms:

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