Safari Live - Day 121 | National Geographic

Every element is defined by the number of protons in its atoms, which is called its atomic number. So, for example, every atom of potassium has 19 protons, and every atom of cobalt has 27 protons. But what about neutrons? Well, an element doesn’t always …

A quality controlled expert at a drink bottling factory took a random sample of bottles from a batch and measured the amount of liquid in each bottle in the sample. The amount in the sample had a mean of 503 milliliters and a standard deviation of 5 milli…

What’s up guys? It’s Graham here. So it’s that time again, and that’s time for another credit card video. Now even though most of us by now know how to properly use a credit card, we understand the concepts. We know to pay off our bill in full every singl…

We’re told that Taylor opened a restaurant. The net value of the restaurant, in thousands of dollars, two months after its opening is modeled by ( v(t) = 2t^2 - 20t ). Taylor wants to know what the restaurant’s lowest net value will be. Let me underline t…

When do you want to die? The Reaper is busy, but he can fit you in right now. Too soon? Later, perhaps? Future you will keep the appointment? Old and with a life fully lived, perhaps ever so slightly bored and ready? Now you might think that, but when th…

What we’re going to do in this video is think about different ways to represent multiplication, and especially connect it to the notions of skip counting and the number line. So, if we were to think about what 4 times 2 means, we’ve already seen in other…