A coral reef grows 13 m every week. How much does it grow in 8 weeks? Write your answer in millimeters

Mathematics

1 answer:

Anastasy [175]3 years ago

3 0

In 8 weeks the reef grows 13 m, or 104 m.

Converting 104 m into mm:

104 m 1000 mm

--------- * ------------- = 104,000 mm

1 1 m

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A student earned grades of 84, 78, 84, and 72 out of 100 on her four regular tests. She scored 78% on the final exam and 86% on

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If the student received marks of 84, 78, 84, and 72 on her four normal tests, her weighted mean grade is 81.2 percent.

The mean is described as a single number that indicates either the closed value for each item in the collection of data or the mean value for the whole set of data.

On her four regular tests, a student had grades of 84, 78, 84, and 72 out of 100. She received 86 percent on her class projects and 78 percent on the final test.

You may compute the weighted mean as follows:

$\rm W_m= 0.4 \times ( \frac{84+78+84+72}{4} )+0.3 \times 78 +0.1 \times 86 + 0.2 \times 87 \\\\ W_m= 81.2 \%$