Exponential Functions Review

What type of function is f(x)=2(1/7)^x ?

• Exponential Growth
• Linear
• Exponential Decay
• None of the Abovee

Is the pictured graph growth, decay, or linear or none?  

• Exponential Growth
• Exponential Decay
• Linear
• None

True or False: This is an exponential function.

• True

• False

A new savings account is opened with $400 and gains 3% every year. What is the exponential function?

• f(x)=400(1+3)^x
• f(x)=400(1-0.03)^x
• f(x)=400(1+0.03)^x
• f(x)=400(0.03)^x

What is the domain of the function shown?

• All real numbers

• All real numbers greater than 1

What is the range of the function shown?

• All real numbers

• All real numbers greater than 1

Does the equation represent an exponential function?

• Yes

• No

Which is the correct equation? "A culture has 1250 bacteria and the sample is growing at a rate 0f 4.5% each day. How much basteria will there be in the sample after t days?"

What is the initial value of the situation represented by f(x)=0.05(2)^x?

• 0.05

• 2

• 0.1

• 1

An adult takes 400 mg of ibuprofen. Each hour, the amount of ibuprofen in the person’s system decreases by about 29%. How much ibuprofen is left after 6 hours? 

• 51 mg
• 284 mg
• 1843 mg
• 116 mg