Learn how to solve 25% of 45 or 35% of 350.
In this video, I cover three different methods or formulas for finding the percent of a number.
Method one, convert the percent to a fraction
Method two, convert the percent to a decimal
Method 3. If possible you can estimate using 10%
These three methods will help when figuring percentages.
Example problems include,
60% of 120
15% 0f 20
20% of 45
Why do we have sunny weather one day and heavy rain the next?
Large air masses cause some of our weather.
There are four main fronts caused by these air masses.
A cold front is the result of an advancing cold air mass meeting a mass of warm air. The warm air is less dense that the cold air and will rise over the cold mass of air.
A warm front is caused by warm air rising over cold air. During a warm front the warm air will move up and over the cold front.
An occluded front which is a warm air mass stuck between two air masses.
A stationary front which is two air masses with almost the same density and pushes against each other.
Examples of parasitism
This innocent looking bird called a cowbird lays her eggs in another birds nest and expects the unsuspecting mom to raise their young. If this bird kicks her eggs out of the nest the cowbird may destroy her nest. This is just one example of parasitism.
Parasitism is a symbiotic relationship in which one organism benefits and another organism is harmed and in some cases may die. Parasitism is a symbiotic relationship between the different organisms.
Let’s take a look at examples of parasitism.
Mosquitoes These annoying pests will show up at most picnics and start trying to have a meal at your expense. mosquitoes are carriers, or vectors, for some of humanity’s most deadly illnesses, and they are public enemy number one in the fight against global infectious disease. Mosquito-borne diseases cause millions of deaths worldwide
In a similar fashion, ticks will do the same to you, dogs, livestock. The latch on to their host and start eating. Ticks can infect their host with many diseases including Lyme disease.
Many worms are parasitic.
Leech
A leech is a segmented worm that attaches to a host like you and gets a meal from their blood. They secrete a chemical that actually prevents the blood from clotting.
If present in great numbers on a host, these can be debilitating, and in extreme cases, cause death.
E. coli
There are hundreds of different types, or strains, of the bacteria E. coli (Escherichia coli). Most of these are harmless and live in the intestines of healthy people and animals. But some strains of E. coli make a strong toxin that can cause a severe infection.
Mistletoe This plant you will see high in trees is actually a parasite. Mistletoe will attach to their host tree or shrub and then extract water and nutrients from the host plant.
Albino redweed
An 'albino'[a] redwood is a redwood tree which is unable to produce chlorophyll, and so has white needles instead of the normal green. It survives by obtaining sugar through the connections between its roots and those of neighboring normal redwood
Parasitoid wasps lay their eggs inside or on the bodies of the host such as arthropods or caterpillars. the offspring eventually devour their way out causing the death of these hosts.
