What is compound interest?

• Interest earned on principal

• interest that grows over time with every interest period accumulating on the principal

• straight cash paid for a loan

The simple interest formula is I=Prt.  The P represents the principle.  The principle is ___________________.  

• the amount of money borrowed or deposited
• the percent interest for his year
• the amount taxed
• the amount the bank owes you for being a customer at their bank

Tags

CCSS.8.EE.C.7B

Emilio borrows $1200 from a bank with 8% simple interest per year.  How much will he have to pay back total in 2 years?

• $150
• $192
• $1350
• $1392

Jerry borrowed $4,000 for 5 years at 6% simple interest rate. How much interest is that?

• $800
• $1,000
• $1,200
• $1,500

The compound interest formula is:

S = P(1 + i)^t

What does the S represent?

• The amount of interest earned.

• The amount of time that has passed.

• The total amount of money after a certain amount of time.

• The amount required to invest.

If $1,000 is invested at 16% interest, compounded annually, for five years, what is the ending balance?

• $1,225,54

• $2,100.34

• $22,255.40

• $225.54

The Arnold's took out a loan for $195,000 to purchase a home. At 4.3% interest rate compounded annually, how much will they have paid after 30 years?

• $412,749.79
• $529.305.61
• $689,546.99
• $640,891.53

How do you find the interest earned?

• S=I-p

• p-I=s

• s-p=i

What is the equation for compounded quarterly?

• I=s(1+r/4)^4t

• s=p(1+r/4)^4t

• s=p(1+4)^4t

Riley invested $1,000 in savings bonds. If the bonds earn 6.75% interest compounded semi-annually, how much total will Riley earn in 15 years?

• $1,584.62
• $2,651.39
• $2,706.86
• $1,825.10