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2 years ago

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Mathematics

1 answer:

Tasya [4]2 years ago

5 0

Using improper fractions, it is found that they broke the record and were 0.8 minutes faster.

<h3>How to convert improper fractions to standard fractions?</h3>

The conversion is made according to the following formula:

$a\frac{b}{c} = a + \frac{b}{c} = \frac{ac + b}{c}$

In this problem, the time had to be faster than $12\frac{2}{5}$ minutes, which is a time in minutes of:

$12\frac{2}{5} = 12 + \frac{2}{5} = 12 + 0.4 = 12.4$

Researching the problem on the internet, it is found that their time was of $11\frac{3}{5}$ minutes, hence:

$11 + \frac{3}{5} = 11 + \frac{3}{5} = 11 + 0.6 = 11.6$

11.6 < 12.4, hence they broke the record.

12.4 - 11.6 = 0.8, hence they were 0.8 minutes faster.

You can learn more about improper fractions at brainly.com/question/14759886

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Select all the shapes below that have a constant cross-section between a

meriva

The shapes below that have a constant cross-section between a pair of faces are cylinder, cube, sphere, hexagonal, and prism.

<h3>What is the definition of geometry?</h3>

It is concerned with the geometry, region, and density of various 2D and 3D shapes.

A cylinder is a closed solid with two parallel circular bases and a curving surface connecting them.

The shapes have a constant cross-section between a pair of faces like a cylinder.

Hence,cylinder, cube, sphere, hexagonal, and prism are the forms below that have a constant cross-section between a pair of faces.

To learn more about geometry, refer to brainly.com/question/7558603.

#SPJ1

5 0

1 year ago

I need help understanding this!!!!

-Dominant- [34]

The answer is 7.0 in. because half of 49 is 7 and 7 time 7 is 49.

4 0

3 years ago

7. Over the past 50 years, the number of hurricanes that have been reported are as follows: 9 times there were 6 hurricanes, 13

poizon [28]

Answer:

Step-by-step explanation:

Let us first generate the frequency table from the information given:

Hurricane number(X) Frequency(f) f(X)

6 9 54

8 13 104

12 16 192

14 12 168

Total ∑(f) = 50 ∑f(x) =518

In order to determine the last frequency (the remaining years), we will add the other frequencies and subtract the answer from 50, which is the total frequency (50 years). This is done as follows:

Let the last frequency be f

9 + 3 + 16 + f = 50

38 + f = 50

f = 50 - 38 = 12

Now, calculating mean:

$\bar {X} = \frac{\sum f(x)}{\sum(f)} \\\\\bar {X} = \frac{518}{50} \\\\\bar {X} = 10.36$