Function Review Quiz

You invest $400 for 5 years and the interest rate is 4.29% compounded monthly each year.

• y=400(1 + 0.0429)⁵

• y=400(1+.003575)⁵

• y=400(1+ .0429)⁶⁰

• y=400( 1 + .003575)⁶⁰

Using the parent function y=3^x what would the graph of y=3^x+1 look like?

• Horizontal shift left one unit!
• Horizontal shift right one unit!
• Vertical shift up one unit!
• Vertical shift down one unit!

Tags

CCSS.HSF-IF.C.7E

A particular radioactive element has a half life of 25 years. For an initial mass of 10 grams, the mass y in grams after t years is given by
y=10(1/2)^t/25 where t>0
How much does the mass remains after 120 years?

• .682
• .25
• .5
• .359

Tags

CCSS.HSF.LE.A.4

Liam deposits $15,000 at the local bank. The bank offers 8% annual interest. How much will he have after 6 years ?

• $22,200

• $20, 241.21

• $24, 231.21

• $23,803.11

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x
• y=30(5000)^x
• y=5000(1.3)^x
• y=5000x^x

Tags

CCSS.HSF.LE.A.2

Write an equation that models the following situation:

Amanda's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a day. Which equation models the growth over one week ?

• y=6(0.14)¹

• y=6(1+14)⁷

• y=6(1.14)¹

• y=6(1.14)⁷

If 8 =  $2^{5x+7^{ }}$  , you would need to re-write 8 with a common base and then x would be?

• -1.25

• 5

•  $-\frac{4}{5}$  

• 3

Ella invests her $550 savings with her Aunt for 5% simple interest. Julia M invest her $550 savings in a bank for 5% interest compounded quarterly. How much more money will Julia have after five years?

• $17.62

• $10.94

• $14.45

• She will have less money than Ella!

Which transformation shows a horizontal compression and a translation to the right on f(x) ?

• 0.5f(x - 2)

• 0.5f(x + 2)

• f(2x + 2)

• f(2x - 4)

Which is a result of a vertical compression on the parent exponential function f(x) = 2^x

• 2(2)^x

• 0.5(2)^x

• 2^2x

• 2^0.5x