Problem: Article: The first property of logarithms, known as the "product rule," states that the logarithm of a multiplied product equals the sum of the logarithms of both factors. Written in equation form:  logb(m * n) = logb(m) + logb(n) Also note that the following must be true:  m > 0 n > 0 Use inverse operations to shift the parts of the equation around so that all logarithms are on one side of the equation while all other elements are on the opposite side.  Example: log4(x + 6) = 2 - log4(x)  log4(x + 6) + log4(x) = 2 - log4(x) + log4(x) log4(x + 6) + log4(x) = 2 If there are two logarithms added together in the equation, you can use the product rule to combine the two logarithms into one.  Example: log4(x + 6) + log4(x) = 2  log4[(x + 6) * x] = 2 log4(x2 + 6x) = 2 Remember that a logarithm is just another way to write an exponential equation. Use the logarithm definition to rewrite the equation in its solvable form.  Example: log4(x2 + 6x) = 2  Comparing this equation to the definition [y = logb (x)], you can conclude that: y = 2; b = 4 ; x = x2 + 6x Rewrite the equation so that: by = x 42 = x2 + 6x Now that the equation has become a standard exponential equation, use your knowledge of exponential equations to solve for x as you usually would.  Example: 42 = x2 + 6x  4 * 4 = x2 + 6x 16 = x2 + 6x 16 - 16 = x2 + 6x - 16 0 = x2 + 6x - 16 0 = (x - 2) * (x + 8) x = 2; x = -8 At this point, you should have the solution for the equation. Write it down in the space provided for your answer.   Example: x = 2 Note that you cannot have a negative solution for a logarithm, so you can discard x - 8 as a solution.
Summary: Know the product rule. Isolate the logarithm to one side of the equation. Apply the product rule. Rewrite the equation in exponential form. Solve for x. Write your answer.

Problem: Article: Go to https://help.uber.com/ in your computer's browser. As with the Uber mobile app, you can request a refund on the Uber site. It's in the upper-right corner of the page. You'll need to sign in with your Uber account to view your trip history and file a dispute for a specific trip. Enter your Uber phone number or email address, click NEXT, check the "I'm not a robot" box if prompted, enter your password, and click NEXT. You'll see this light-grey tab on the left side of the window. It's at the top of the map section, which is just below the "Trip Issues and Refunds" heading at the top of the page. Doing so prompts a drop-down menu. Click the date of the trip for which you want to dispute a charge. This will change the information and links to the right of the map section to reflect the selected trip. This option is to the right of the map section. The trip's page will open. You should see one or more of the following issues listed at the bottom of the page, so click one that suits you:  My driver took a poor route My pickup or drop-off location was wrong The route had heavy traffic Someone else took this trip I paid a toll or parking fee for my driver My driver made an unrequested stop My promo code didn't work I was charged a cleaning fee I had an uberPOOL fare issue I had a different issue with my charge Once you've selected a reason, you'll be able to fill out the form to submit your appeal. Different reasons will have slightly different forms. For example, if you selected "I paid a toll for my driver," there will be a field for you to enter how much the toll was. Make sure you are clear and polite. Angry, disrespectful requests are far more likely to be ignored or rejected than are objective ones. It's a green button at the bottom of the page. This will submit your dispute to Uber. This may take anywhere from 24 hours to a week or more. You'll receive a decision at the email address with which you registered to Uber.
Summary: Open the Uber website. Click SIGN IN. Sign into your Uber account. Click the FOR RIDERS tab. Click the dated drop-down box. Select a trip. Click I would like a refund. Scroll down and select an issue. Enter as many details as possible. Click SUBMIT. Wait for your claim to be processed.

Problem: Article: The effective interest rate attempts to describe the full cost of borrowing. It takes into account the effect of compounding interest, which is left out of the nominal or "stated" interest rate.  For example, a loan with 10 percent interest compounded monthly will actually carry an interest rate higher than 10 percent, because more interest is accumulated each month. The effective interest rate calculation does not take into account one-time fees like loan origination fees. These fees are considered, however, in the calculation of the annual percentage rate. The stated (also called nominal) interest rate will be expressed as a percentage. The stated interest rate is usually the "headline" interest rate. It's the number that the lender typically advertises as the interest rate. The compounding periods will generally be monthly, quarterly, annually, or continuously. This refers to how often the interest is applied. Usually, the compounding period is monthly. You'll still want to check with your lender to verify that, though.
Summary:
Familiarize yourself with the concept of the effective interest rate. Determine the stated interest rate. Determine the number of compounding periods for the loan.