Exp and log test Review Part 2

Describe the transformations of f(x)= -log₂(x+1)

• left one & y-axis reflection
• right one & y-axis reflection
• left one & x-axis reflection
• right one & x-axis reflection

Pick the equation that matches the graph

• A
• B
• C
• D

Classify the given graph.

• exponential growth
• exponential decay
• positive linear
• negative linear

Radium-221 has a half-life of 30 seconds. How long will it take for 95% of a sample to decay? Round to the nearest second.

• 120 seconds
• 150 seconds
• 140 seconds
• 130 seconds

Wendy deposits $7550 in an account in which interest compounds continuously.  What is the interest rate if the account balance doubles in 10 years?

• 20%
• 6.9%
• 6.7%
• 6.3%

$2500 was deposited in a bank account with an annual interest rate of 4.2% where interest is compounded monthly.  Assuming no deposits or withdrawals were made, how much money will be in the account after 8 years?

• $3498.35
• $3474.42
• $3492.22
• $3496.30

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth
• Decay

The following function represents a bank account. 
g(x) = 200(1.25)^x
What was the initial dollar amount put in the bank?

• $200
• $1.25
• $0.25
• $2.00

Make the percent to decimal.
7.25%

• 7.25
• 72.5
• 0.725
• 0.0725

Where would the asymptote be for this graph?

• y = 4
• y = -4
• x = 3
• x = -3