Project Main Details
This is an interesting, ground-floor type of opportunity to participate in a new type of learning product to serve as proof of concept for, we hope, a brand new and expansive line of educational and test prep audio material.
We'll give you one easy-to-read, narrative-inclined and fun script, you just bring your engaging, natural-sounding voice. Let's make an audiobook together! 2009-02-19 13:15:22 GMT 2009-02-25 11:18:00 (GMT -05:00) Eastern Time (US & Canada) Yes (click here to learn more about ) Closed - Note: This project was manually closed by the voice seeker before it reached its original deadline. 88 87 0 direct invitation(s) have been sent by the voice seeker resulting in 0 audition(s) and/or proposal(s) so far. Voice123 SmartCast is seeking 100 auditions and/or proposals for this project (approx.) Invitations sent by SmartCast have resulted in 88 audition(s) and/or proposal(s) so far.
You can think of Radicals as an opposite to the powers. It’s that funny, lightning-bolt looking symbol with a number underneath. And, sometimes, on the outside, too. Let’s say that the number outside the radical is a three and the number inside is twenty-seven. This can be thought of as “what number to the third power is twenty-seven”? The answer is three, by the way. If you don’t understand, don’t worry---we’ll get into this in a little more detail, later. For now, you should understand what the symbol looks like and means.
Are you familiar with mean, median, and mode yet? The mean is the most recognizable and most used type of average---that thing you do when you’re trying to figure out your grade in a class, where you add up all of your test scores and then divide that sum by the number of tests you’ve taken. For instance, let’s say you took five tests in a class and scored an 88, 90, 99, 95 and a 75. Your average would be the sum of those test scores---so, four hundred forty seven---divided by the number of tests, or five. The result? An 89. Not bad.
Medians and modes are ways to estimate averages. For instance, in a set of numbers, the median is the one that’s smack in the middle. So, in the set 5, 1, 5, 1, 7, the median is 5. And what if there are an even number of samples, and therefore no exact median? Take the average of the middle two numbers. The mode is simply the number that occurs the most in a series. So, if you had a set of 1, 5, 2, 2, and 7, 2 would be the mode.
Now that that’s over, let’s talk about several different ways to represent numbers and how to manipulate them a little bit. Really, this is what arithmetic is all about. And if you understand arithmetic, you’ll well on your way to understanding algebra.
Scientific notation is a related way of expressing a number. It’s mostly used when there are extremely large or extremely small numbers that need to be expressed efficiently. The end product is a number written as something between one and ten times ten to a power. And the “times ten to a power” part just tells you how many places to move the decimal point. If it’s ten to the fourth power, then to get the decimal equivalent, just move the decimal place four places to the right. Five point four three seven six seven times ten to the fourth becomes fifty-four thousand, three hundred seventy-six point seven. If the “times ten to a power” has a negative power, then move the decimal point in the opposite direction. The same figure times ten to the negative four power ends up as zero point zero zero zero five four three seven six seven. To add, subtract, multiply, and divide, just convert to decimal notation first and then use the calculator.
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