If you're taking a high school or college math class, you'll likely cover natural logs. But what are natural logs? What is ln? Why does the letter e keep showing up?

Natural logs may seem difficult, but once you understand a few key natural log rules, you'll be able to easily solve even very complicated-looking problems. In this guide, we explain the four most important natural logarithm rules, discuss other natural log properties you should know, go over several examples of varying difficulty, and explain how natural logs differ from other logarithms.

What is the density of water? Does it matter what the temperature is? How can you figure out the density of other objects and liquids?

In this guide we explain water density, provide a chart you can use to find the density of water at different temperatures, and explain three different ways to calculate density.

Everyone struggles with homework sometimes, but if getting your homework done has become a chronic issue for you, then you may need a little extra help. That’s why we’ve written this article all about how to do homework. Once you’re finished reading it, you’ll know how to do homework (and have tons of new ways to motivate yourself to do homework)!

We’ve broken this article down into a few major sections. You’ll find:

• A diagnostic test to help you figure out why you’re struggling with homework
• A discussion of the four major homework problems students face, along with expert tips for addressing them
• A bonus section with tips for how to do homework fast

By the end of this article, you’ll be prepared to tackle whatever homework assignments your teachers throw at you.

So let’s get started!

Your first step in preparing for the math section of the digital SAT should be familiarizing yourself with exactly what's on it. Whatever math class you're taking in school, you should be able to conquer the SAT math topics with the right approach to test prep. Let's start this guide by reviewing the overall format of the math section of the SAT.

What do you have in common with Kesha, Bill Gates, Al Gore, and Derek Jeter? They all had to take the SAT when they were in high school, just like you!

However you feel about the SAT, it's a landmark in the lives of many American students (and lots of international ones, too). Taking the SAT is an experience that many of you will share and remember well for the rest of your lives. Let's check out some SAT scores of the rich and famous—and talk about how you can achieve some Kesha-worthy scores of your own.

Do you need a copy of your transcript in order to apply to college, find a job, or for your own personal use, but aren't sure how to get one? This guide will explain why you need a high school transcript and how you can get yours, even if you are no longer a high school student.

Extracurriculars are a great way to participate in an activity you enjoy and meet new people, and they can also be an important part of your college application.

What makes an extracurricular activity particularly impressive to colleges? How do your extracurriculars measure up?

Read this guide to see four amazing extracurricular activities examples. I'll discuss why they're exceptional and how you can participate in similar activities to boost your own college application.

There's not a whole lot of information out there on how essay length affects ACT Writing scoring. Are longer essays better? But the essay scoring rubric doesn't say anything about essay length, so maybe it doesn't matter? Fear not—your questions will be answered in this article.

Touring your prospective colleges is a great opportunity to learn from the people who study, work, and teach on campus. By keeping your eyes and ears open, you can gain a strong sense of a school and its culture, far beyond the facts and figures on its website.

To make the most of your visits, you should prepare thoughtful questions to ask on a college tour. This guide will provide you with a comprehensive college visit checklist of questions for your tour guide, current students, admissions officers, financial aid officers, and professors. Plus, we'll offer some advice on what not to ask.

If there's one sign of the zodiac that has big feelings, it's Pisces. With enough empathy for everyone, Pisces can make a steadfast friend and partner.

But what character traits does this bleeding heart look for when it comes to love and relationships? Our full guide to Pisces compatibility will answer your questions about what makes a best match for Pisces and more, including the following:

• The core traits of the Pisces star sign
• The character traits that make a Pisces' best match and worst match
• A ranking of Pisces compatible signs from least to most compatible
• Three main takeaways for a Pisces in relationships.

Ready to learn more about this water sign? Then let's get started.

What is pre-med? When people say that they're pre-med, what does that actually mean? If you're planning to attend med school and become a doctor, it's important that you understand the definition of pre-med and what you should be doing as a pre-med student.

Read on to learn what it really means to be a pre-med, what you should be focusing on to get into med school, and what the best majors for pre-meds are and why.

Are you interested in performing community service? Do you want examples of service projects you can do? Community service is a great way to help others and improve your community, and it can also help you gain skills and experience to include on your resume and college applications.

Read on for dozens of community service ideas to help you get started volunteering.

Whatever your ACT Math prep plan, whether you're doing self-study, a class, or working with a tutor, you need to be working with real ACT Math practice materials. The ACT Math test will be unlike any other Math test you've taken. You need to work with the real material to get used to the pacing and style of this unique test. In this guide, I'll let you know where to find free and paid official ACT Math practice tests.

Do you have messy handwriting? If so, trust me, you're not alone. Given only 40 minutes to plan and write an essay, most students end up with at least slightly sloppy handwriting. How does bad handwriting affect your ACT Writing score? Can you end up with a lower score? Can you end up with a score of zero? I've got the answers to these questions along with more ACT Writing advice.

You may have heard that extracurriculars are an important part of your high school life. You've probably been bombarded with stories about how everyone who is successful in getting into college played a varsity sport and was student body president and built homes for the poor in Costa Rica.

But do extracurriculars have to be so overwhelming? What are extracurricular activities, exactly? And just how important are they when it comes time to apply to college?

Read on for a better understanding of this important topic.