18. A payday loan is made for six weeks, where the amount of interest owed per $100 borrowed is $20. If you borrow $500 for six weeks, answer the following questions.
a. How much do you owe at the end of six weeks?

b. What is the APR for this transaction?

Use the numbers in the multiplication equation 45 x 1/9 =5 to write a division equation involving division by a fraction.

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms