Prime factorization of 30 and 90

Prime factorization of 30 and 90. Prime factorization which is also called integer factorization or prime decomposition involves finding which numbers multiply together to equal the original number. In this video, I use a factor tree to find the prime factors of 30 and 90. 



Integer factorization of  30

Integers factorization of 90



Prime decomposition of 30

Prime factorization of 90



Which numbers multiply together to equal 30

Which numbers multiply together to equal 90



Set of prime numbers for 30

List of prime numbers for 90



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Prime Factorization of 28 and 99

Prime factorization of 28 and 99 Prime factorization which is also called integer factorization or prime decomposition involves finding which numbers multiply together to equal the original number. In this video, I use a factor tree to find the prime factors of 28 and 99
Integer factorization of 28
Integers factorization of 99
Prime decomposition of 28
Prime factorization of 99
Which numbers multiply together to equal 28
Which numbers multiply together to equal 99
Set of prime numbers for 28
List of prime numbers for 99
MooMooMath and Science upload a new math or science video every day. We have over 1400 math and science videos to help in school and life.

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How to calculate the discounted price including sales tax

How to calculate the discounted sales price.

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Different layers of atmosphere

The earth is surrounded by a very thick layer of gases called the atmosphere.

The atmosphere is divided into 4 layers based on temperature changes. The first layer is the troposphere and this is the location of our weather. We live in the troposphere and the temperature changes often in this layer. However, as you go higher in the troposphere the temperature drops. This layer of the earth extends 10 kilometers upward.
The stratosphere is where you find the ozone layer. The ozone protects us from harmful ultraviolet radiation given off by the sun. As you go higher in the stratosphere, temperatures also get higher.
The mesosphere is very cold and reaches 80 kilometers above the earth. This layer burns up space junk which would strike the earth. This is because there is enough air in this layer to cause friction and burn up the debris.
The thermosphere is the hottest layer of the earth's atmosphere and is where satellites orbit. The thermosphere is on the edge of space and many of our satellites orbit in this layer.

MooMooMath and Science upload a new math or science video every day. We have over 1400 math and science videos to help in school and life. https://www.youtube.com/channel/UCE_WiQFez8FZcICpbwblyyg

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How clouds are classified

How are clouds classified?

Clouds are created when water vapor in the air cools off, condenses and tiny droplets are formed.

Clouds can be classified based on form and altitude.

Cumulus clouds are puffy clouds that seem to just float along. However, these clouds can produce thunderstorms if they become a large cloud called a cumulonimbus cloud.

Stratus clouds are clouds that form in layers. These clouds may cover a large area and can often block out sunlight.

Cirrus clouds may appear like feathers and form when the wind is strong.

Clouds can also be classified based on altitude.

Many stratus clouds are found low. For example, stratocumulus, and nimbostratus clouds are found low in the atmosphere.

The prefix alto is used to describe clouds of middle altitude, and cirrus clouds are found very high in the atmosphere.

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Cold Warm Occluded Stationary-Types of Weather Fronts

Types of weather fronts

There are four main types of fronts. Weather fronts occur when large masses of air which has different temperatures interact.
Cold air is denser than warm air and therefore wants to settle below this warmer air.
The warm air moves upwards and cools which may result in rain, sleet, snow, or hail.

Four types of fronts

Cold front: When cold air overtakes warm air

Warm front: When warm air overtakes cold air

Occluded front Warm air gets trapped between cold two cold fronts

Stationary front: Two air masses of similar density meet each other and become stationary

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How to change a recurring decimal to a fraction

How do you convert a recurring decimal into a fraction?

For example, convert .333 to a fraction.

Follow these steps to convert the recurring decimal to a fraction

Step 1:

Set up an equation by setting x equal the repeating decimal you are trying to convert to a fraction.

This is equation one.
Step 2:
Set up a second equation in which the repeating decimal is to the left of the decimal point. This is equation two.

In order to do this, you will have to multiply x by a factor of 10

Step 3:
Subtract equation one from equation 2
Step 4:
Solve for x

Step 5:


Example problems

Example 1. Change .666 to fraction form.
Step 1. X = .6666
Step 2.
In order to have the repeating decimal to the left of the decimal, you need to move the decimal one place to the right.

Remember, what you do to one side of the equation you must perform on both sides.

Multiply both sides by 10

10x = 6.666

Step 3. Subtract equation 1 from equation 2
10x = 6.66

   X = 0.666
____________

9x = 6

Step 4. Solve for x

9x = 6

9   = 9

X = 6/9 which equals ⅔
Example 2
Convert the decimal .1616….. to a fraction
Step 1. X = .1616
Step 2. 10x = 16.1616…
Step 3.
100x = 16.1616

- x   = .1616

____________

99x = 16

Step 4.

99x = 16

99       99

X = 16/99

Step 5

Simplify the fraction

16 / 9 = 2

99/ 9 = 11

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