- 19.01.2019

So how do we figure out the distance to the gift store? At not point here do they say, hey, the gift store is this far away. But they do tell us, this first sentence right over here, "Umaima traveled uphill to the gift store for 45 minutes at just 8 miles per hour.

And we are given a speed. We should be able to figure out a distance. So let's just do a little bit of aside here. We should be able to figure out the distance to the-- actually let me write it this way.

The distance to the store will be equal to-- now we've got to make sure we have our units right. Here they gave it in minutes. Here they have 8 miles per hour. So let's convert this into hours. So 45 minutes in hours, so it's 45 minutes out of 60 minutes per hour. Divide both by So what is the distance to the store?

Let me just write that. That's going to be 24 over 4 which is equal to-- did I get it? And units-wise, we're just left with miles. So the distance to the store is 6 miles. Now, what is the time to the gift store? Well, they already told that to us. They already told us that it's 45 minutes. Now, I want to put everything in hours. I'm assuming that they want our average speed in hours. How much did the credit union loan out at each rate?

Show Step-by-step Solutions How to solve interest problems using the simple interest formula? If you have a saving account, the interest will increase your balance based upon the interest rate paid by the bank. If you have a loan, the interest will increase the amount you owe based upon the interest rate charged by the bank.

What will the new balance be? Note that this problem requires a chart to organize the information. The chart is then used to set up the equation. Show Step-by-step Solutions How to solve word problems with two simple interest rates? Johnny is a shrewd eight-year-old. Specifically, there are two major types of interest problems you may be asked to solve: simple interest and compound interest.

Simple Interest If your money grows according to simple interest, you're basically just earning a small percentage of your initial investment each year as interest. Here's the bad news: Even though your account will grow slightly every year, you won't earn more interest! In simple interest problems, you only earn interest on the initial investment, no matter how long you've had an active bank account or how much interest that money has accrued.

Example 1: You were a very thrifty and money-savvy child. What is the balance of the account exactly 30 years later? Critical Point To convert a percent into a decimal, drop the percent sign and multiply by.

For instance, the decimal equivalent of 6. Conversely, to change a decimal into a percent, multiply by and stick a percent sign on the end. Therefore, the percent equivalent of. Solution: To calculate the balance of an account, just add the interest you earned to the principal. Of course, you still need to figure what that interest is. One way they do this is via compound interest, in which you earn money based on your original principal and the interest you've accrued to that point.

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How much was invested into each account rounded to the nearest cent? What is her average speed for the entire trip from home to the gift store and back? Specifically, there are two major types of interest problems you may be asked to solve: simple interest and compound interest. In this formula, p is the principal investment, r is once again the annual interest rate in decimal form, n is the number of times interest is compounded in one year, and b is the balance in your account after exactly t years have elapsed. And then we get total distance divided by total time-- 12 miles per hour. We welcome your feedback, comments and questions about this site or page. Critical Point To convert a percent into a decimal, drop the percent sign and multiply by. And then our total time we can figure out. All rights reserved including the right of reproduction in whole or in part in any form.

They already told us that it's 45 minutes. So the distance to the store is 6 miles. Talk the Talk The amount of money you initially deposit in an interest problem is called the principal.

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We just doubled that to get the time back. So let's just do a little bit of aside here. So we're trying to figure out her average speed for the entire trip. That's going to be equal to the total distance that she traveled over the total time. They tell us the time to the store. I'm assuming that they want our average speed in hours.

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If you have a loan, the interest will increase the amount you owe based upon the interest rate charged by the bank. The formula for calculating compound interest is slightly more complicated than simple interest; it looks like this: Critical Point The more times the interest in your account is compounded, the more money you'll earn. Now, what is the time to the gift store? I'm assuming that they want our average speed in hours. So let's see which of these we can actually-- we already know.

But that wouldn't have been right, because she's traveling those for different amounts of time. I'm assuming that they want our average speed in hours. The formula for calculating compound interest is slightly more complicated than simple interest; it looks like this: Critical Point The more times the interest in your account is compounded, the more money you'll earn. Here they have 8 miles per hour.
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**Migami**

And we are given a speed. And that fits our intuition.

**Fenrigami**

But that wouldn't have been right, because she's traveling those for different amounts of time. Figure out the total distance. Critical Point To convert a percent into a decimal, drop the percent sign and multiply by. Solution: To calculate the balance of an account, just add the interest you earned to the principal.

**Akinojar**

At not point here do they say, hey, the gift store is this far away. Her average speed is just 12 miles per hour.

**Bralrajas**

And that fits our intuition. How much did the credit union loan out at each rate? So it would take her longer to get there than it took her to get back.