7.1.3 Interest

Heather invested $8,000 in a 4-year savings account pays 4.1% interest, compounded annually. What is the value of the saving account at the end of the 4 years?

• $9,394.92

• $9,312.00

• $1394.00

• $1312.00

1) Gabby invested $100 into a savings account that earned simple interest at a rate of 1.5%.  She plans to keep the money in the account for the next ten years.  How much would she have in the account at the end of ten years?

• $15
• $115       
• $116.05
• $1,500

Tags

CCSS.HSF.BF.A.2

Heather invested $8,000 in a 4-year savings account pays 4.1% interest, compounded annually. Write an equation to model the situation

• y=8000(.959)^x

• y=8000(.1.041)^x

• y=328x+8000

1) Gabby invested $100 into a savings account that earned simple interest at a rate of 1.5%. Write the equation to represent the equation

• y=1.5x+100

• y=100(1.015)^x

• y=100(.985)^x

If this graph represents a saving account, what kind of interest would you be earning?

• Simple

• Compounded

The table represents an exponential function in the form $y=ab^x$ Find the corresponding equation 

•  $y=151\left(.8\right)^x$  

•  $y=63\left(.8\right)^x$  

•  $y=2416\left(.2\right)^x$  

• y=-19.328x-135.296

The cost of a pair of concert tickets was $150 dollars yesterday and today it is $162. What is the percent increase and what is the multiplier?

• 8%, 1.08

• 8%, .92

• 80%, 1.8

• 80% .2