Explore the latest published articles on finance, health, math, and engineering.
Posted By: Jordan Hayes
Add a password to any PDF free in your browser — and understand what you are really getting: how PDF encryption works, user vs. owner passwords, what protection can and cannot stop, and safe password sharing.
Posted By: Jordan Hayes
Adobe Acrobat Pro costs $239/year — but you can edit PDF text, fill forms, sign documents, and white-out content for free in your browser. Here are 7 methods, with the exact tool for each job.
Posted By: Jordan Hayes
Yes — e-signatures have been legally binding in the US since 2000 and across the EU under eIDAS. Here is what the law actually requires, the documents that still need ink, and how to sign a PDF that holds up.
Posted By: Jordan Hayes
BMI works differently for women than men. Healthy body fat percentages are higher for women, BMI thresholds can vary with age, and pregnancy changes everything. This guide covers healthy BMI ranges by age, body fat comparison, and when BMI alone is insufficient.
Posted By: Jordan Hayes
The "new BMI" corrects a 200-year-old height bias in the standard formula. We compare both formulas side by side, show worked examples for tall and short adults, and explain when the difference actually matters for your health.
Posted By: Marcus Webb
Learn to calculate simple, compound, and planetary gear ratios with step-by-step worked examples, formulas, torque relationships, and a free gear ratio calculator.
Posted By: Jordan Hayes
To set macros, start with your TDEE, apply a calorie target (deficit for fat loss, surplus for muscle), then split into protein, fat, and carbs (remainder).
Posted By: Jordan Hayes
The Federal Reserve's 2022 Survey of Consumer Finances shows median net worth for Americans under 35 is $39,000 while those 65–74 hold $409,900.
Posted By: Jordan Hayes
Learn how to calculate your running pace, set race time goals, and train in the right heart rate zones. Includes pace tables for 5K, 10K, half marathon, and marathon.
Posted By: Jordan Hayes
Loan-to-value ratio (LTV) is the percentage of a home's value you are borrowing. An 80% LTV means you are putting 20% down. It controls whether you pay PMI, what interest rate you get, and whether you qualify at all. Here is everything you need to know.
Posted By: Jordan Hayes
Dollar-cost averaging invests a fixed amount at regular intervals regardless of price. It mechanically buys more shares when prices are low and removes emotional decision-making. Research shows DCA outperforms market timing in 68% of scenarios over 10 years.
Posted By: Jordan Hayes
Index funds and ETFs both track market indices passively with low fees. Key differences: trading mechanics, tax efficiency, and minimums. For most 2026 beginners, ETFs or Fidelity ZERO funds are the practical starting point.