PLEASE, I NEED ANSWER NOW!
Molly had $30 in a savings account. The simple interest is 5% per year. How much interest she earn in 2 years?

Please explain how did you get it.

Step-by-step explanation:

P = $ 30

r (rate of interest) = 5%

t (no. of years = 2 years

Simple interest = Prt/100

= $3

She will be charged $180 once lets the account go past 6 months before making a payment.

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

After t years, the total amount of money is:

In this question:

If she pays within 6 months, she is not charged any interest.

However, if after 6 months she has not paid the balance, she is charged 20% interest for this period.

Barbara financed a new bedroom set at the furniture store for $1,800.

This means that

20 percent interest

This means that

How much interest will she be charged once she lets the account go past 6 months?

6 months is half a year, so this is E when

She will be charged $180 once lets the account go past 6 months before making a payment.